Appendix:English prefixes

Main category: English prefixes

English has many prefixes that are used to construct words, particularly in scientific and medical language. For a list of suffixes, see Appendix:English suffixes.

This page organizes prefixes alphabetically. To see this content sorted by category, see Appendix:English prefixes by semantic category. For a list of prefixes specifically for nationalities, ethnic groups, and languages see Appendix:English nationality prefixes. For SI prefixes: Appendix:SI units.

Contents: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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References

Prefixes that start with A.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
a-01	a-01	(non-productive) Forming verbs with the sense away, up, on, out.	e.g. arise, await	Abstract	Spatial
a-02	a-02	(non-productive) Forming verbs with the sense of intensified action.	e.g. abide, amaze	Abstract	Similarity
a-03	a-03	(non-productive) In, on, at; used to show a state, condition, or manner. Also passing into sense 2.	e.g. apace, afire, aboil, a-bling	Abstract	Possession
a-04	a-04	(non-productive) In, into.		Abstract	Spatial
a-05	a-05	In the direction of, or toward.	e.g. astern, abeam	Abstract	Spatial
a-06	a-06	(archaic, dialectal) At such a time.		Abstract	Specificity
a-07	a-07	(archaic, dialectal) In the act or process of. Used in some dialects before a present participle.		Abstract	Completion
a-08	a-08	General indicator of a participle, often a past particple.	e.g. aware, alike	Abstract	Temporal
a-09	a-09	(Devon) Used to form the past participle of a verb.	e.g. a-gone, a-seen	Abstract	Temporal
a-10	a-10	(non-productive) Forming words with the sense of wholly, or utterly out.	e.g. abash	Abstract	Completion
a-11	a-11	Not, without, opposite of.	e.g. amoral, asymmetry, atheism, asexual, acyclic, atypical	Abstract	Negation
a-12	a-12	(non-productive) Towards; Used to indicate direction, reduction to, increase to, change into, or motion.	e.g. ascend, aspire, amass, abandon, avenue	Abstract	Completion
a-13	a-13	(non-productive) Away from.	e.g. avert, aperient, abridge, assoil	Abstract	Spatial
a-14	a-14	(non-productive) Of, from.	e.g. anew, afresh	Abstract	Origin
a-15	a-15	Empty syllable added to songs, poetry, verse and other speech.	e.g. A-tisket a-tasket	Colours, shapes, and textures	Sounds
a-16	a-16	(Chester) Used as a prefix to verbs in the sense of remaining in the same condition. Actively doing something.	e.g. a-be, Let that choilt a-be	Abstract	Rates
ab-	ab-, abs-	Away from, without.	example(s) from : abduction, abdomen	Abstract	Spatial			Away
abdomin-	abdomin-, abdomino-	The abdomen.	example(s) from : abdomen, abdominal	Body parts	Anatomical regions
abio-	abio-	Without life.	e.g. abiotrophy, abiogenesis, abiosis	Body processes	Pathological
Abkhazo-	Abkhazo-	Abkhazia, Abkhaz.		Proper nouns	Extant countries
abro-1	abro-1	(biology) Delicate, graceful., pretty.		Abstract: Correctness	Correctness	Beauty		= Beautiful
abro-2	abro-2	Dainty, unstable, not fixed.	e.g. abrosexual	Abstract	Rates
ac-	ac-	To, toward, near.		Abstract	Spatial			Towards
acanth-	acanth-, acantho-	With thorns, spikes.	example(s) from : acanthion, acanthocyte, acanthoma, acanthulus	Colours, shapes, and textures	Shapes			Spiky
acaro-	acar-, acari-, acario-, acaro-	Mites, ticks.		Lifeforms	Animals
accelero-	accelero-	Acceleration.		Abstract	Rates
accipitr-	accipitr-	Hawk, bird of prey.		Lifeforms	Animals
acer-	acer-	Bitter, sour, sharp.		Physical properties	Tasteable properties
aceto-	acet-, aceto-	Methyl group bonded to a carboxyl group.		Chemical substances	Radicals
aci-	aci-	(chemistry) The acid of a tautomeric compound.		Chemical substances	Acids
acicul-	acicul-	Needle, needlelike. Needle-shaped.		Colours, shapes, and textures	Shapes			Cylindrical
acido-	acido-	Acidic.		Physical properties	Tasteable properties
acipenser-	acipenser-	(biology) Sturgeon.		Lifeforms	Animals
acou-	acou-, acous-, acouso-, acoust-, acousto-	Sound.	example(s) from : acoumeter, acoustician, hyperacusis	Body processes	Sensory
acrid-	acrid-, acrido-	(biology) Grasshopper.		Lifeforms	Animals
acro-01	acr-01, acro-01, akro-01	The extremities: limbs, head, fingers, toes, etc.	e.g. acroarthritis, acroasphyxia, acrodysplasia	Body parts	Anatomical regions
acro-02	acr-02, acro-02, akro-02	Located or positioned at a tip or tips of an object or body.	e.g. acrocentric, acropleurogenous, acrocarpous	Abstract	Spatial
acro-03	acr-03, acro-03, akro-03	Located or positioned at the top; uppermost.	e.g. acrodendrophile, acropleustophyte, acrotrophic	Abstract	Spatial
acro-04	acr-04, acro-04, akro-04	Beginning, initial.	e.g. acrophony, acronym, acrography	Abstract	Completion
acro-05	acr-05, acro-05, akro-05	Pointed in shape.	e.g. acrocephalic, Acronicta, acrocranial	Colours, shapes, and textures	Shapes			Conical
acro-06	acr-06, acro-06, akro-06	Heights, high in location.	e.g. acrophilia, acrophilia, acrophobe	Abstract	Spatial
acro-07	acr-07, acro-07, akro-07	The peak of a wave or cycle; accented.	e.g. acrophase, acrostatic	Abstract	Temporal
acro-08	acr-08, acro-08, akro-08	Upper.	e.g. acrophyll, acrolect, acrodactylum	Abstract	Spatial
acro-09	acr-09, acro-09, akro-09	High in altitude, montane.	e.g. acrophyte, acrophile	Abstract	Spatial
acro-10	acr-10, acro-10, akro-10	Etching or engraving.	e.g. acrography, acrography	Human activities	Types of media
acro-11	acr-11, acro-11, akro-11	Acrobatics.	e.g. acrobalance, Acroyoga	Human activities	Other human activities
acromio-	acromio-	(anatomy) Acromion; the outermost point of the shoulder blade.		Body parts	Bones
acrylo-	acrylo-	Acrylic.	e.g. e.g acrylonitrile, acryloyl	Chemical substances	Materials
actino-1	actin-1, actino-1	(biology) Ray, ray-shaped.	e.g. actinolite, actinomycete	Colours, shapes, and textures	Shapes			Cylindrical
actino-2	actin-2, actino-2	(biology) Radial geometry, radial symmetry.	e.g. actinogonidial, actinostele, actinomorphic	Abstract	Basis
actino-3	actin-3, actino-3	(physics) Actinic; actinic radiation.	e.g. actinometer, actinochemistry, actinotherapy	Physical properties	Other physical properties
acu-1	acu-1	Sharp.		Colours, shapes, and textures	Textures			Sharp
acu-2	acu-2	Needle.		Technologies	Tools and machine components
acu-3	acu-3	Sudden.		Abstract	Temporal			Temporary
aculo-	acule-, aculo-, acumin-, acuti-, acuto-	(biology) Sting, stinging; thorn, spike.		Body processes	Sensory
ad-1	ad-1	(no longer productive) Doing, enacting, forming a verb.	e.g. accouple, admarginate, admixture, attune	Abstract	Completion
ad-2	ad-2	Near, close to, adjacent.	e.g. adaxonal, addental, admedial	Abstract	Spatial
ad-3	ad-3	Towards in direction or movement. (anatomy) Towards the midline of the body.	e.g. adapical, adfluvial, adgerminal	Abstract	Spatial
ad-4	ad-4	(no longer productive) Intensifying, additionally.	e.g. acclaim, adsignification, adspection	Abstract	Intensity
ad-5	ad-5	Along, alongside.	e.g. admarginal, adnervular, adstratum	Abstract	Spatial
ad-6	ad-6	Appending and/or prepending. Adding from either side.	e.g. adfix, adposition, affix	Abstract	Spatial
ad-7	ad-7	Modifying.	e.g. adnominal, adverb, assoil	Abstract	Transcendence
ad-8	ad-8	Atop or above in position.	e.g. adatom, adcumulate, aggrade	Abstract	Spatial
adeno-	aden-, adeno-	Gland, or pertaining to the adenoid.	example(s) from : adenocarcinoma, adenology, adenotome, adenotyphus	Body parts	Organs
adipo-	adip-, adipo-	Adipose; fat.	example(s) from : adipocyte	Body parts	Connective tissues
adreno-	adren-, adrenal-, adreno-	Relating to the adrenal gland.	example(s) from : adrenal artery	Body parts	Organs
aedoe-	aedoe-	Genitalia.		Body parts	Organs
Aegeo-	Aegeo-	The Aegean Sea.		Proper nouns	Regions
aeolo-	aeolo-	In continuous change.	e.g. aeolotropy	Abstract	Similarity			! Variety
aer-1	aer-1, aero-1, aër-1, aëro-1	Aircraft.	example(s) from : aerosinusitis, aerodynamics	Technologies	Transportation
aesthesio-	aesthesi-, aesthesio-, esthesi-, esthesio-	Pertaining to sensation or perception.	example(s) from : esthesioneuroblastoma, esthesia	Body processes	Sensory
af-	af-	Away, from, off.		Abstract	Spatial			Away
Afghano-	Afghano-	Afghanistan, Afghan, Afghanistani.		Proper nouns	Extant countries
afore-	afore-	Previously, before.		Abstract	Temporal			4 - Past
Afro-	Afro-	African.	e.g. Afrocentric, Afropop	Proper nouns	Regions
aft-	aft-	Positioned at or near the back.		Abstract	Spatial			Back
after-1	after-1	(non-productive) With contrary, subordinate, or remote effect; denoting hindrance, setback, inferiority, etc.	e.g. afterdeal, aftertale	Abstract	Ranking
after-2	after-2	With adverbial or adjectival effect, forming compound words indicating something that comes afterwards in spacial position.	examples from : after-limb, after-ship, afterdeck	Abstract	Spatial
after-3	after-3	With prepositional effect, forming compound words denoting something which follows the second element of the compound, and is less intense or significant.	examples from : afterglow, aftershock, afterthought	Abstract	Temporal
after-4	after-4	With prepositional effect, forming compound words denoting follows and is a result of the second element of the compound.	examples from : afterbirth, afterlife, afternoon	Abstract	Influences			Consequent
ag-	ag-	To, towards.		Abstract	Spatial			Towards
again-1	again-1	(non-productive) Once more, again.	e.g. againrising	Abstract	Temporal
again-2	again-2	(non-productive) Against.	e.g. againsaw, againsay, againstand	Abstract	Polarity			Opposition
agglutin-	agglutin-, agglutino-	(medicine) Adhere or clump.		Abstract	Composition			Joining
agor-	agor-, agora-	(medicine) Marketplace.		Social facts	Social institutions
agri-	agr-, agri-, agrio-, agro-	Agriculture.	e.g. acroecology, agrochemical, agrophotovoltaics	Human activities	Other human activities
ailuro-	aeluro-, ailur-, ailuro-	Cat.		Lifeforms	Animals
Akkado-	Akkado-	Akkad, Akkadia, Akkadian.		Proper nouns	Historical countries
Albano-	Albano-	Albanian, Albania.		Proper nouns	Extant countries
albo-	alb-, alba-, albi-, albin-, albino-, albo-, albu-	White.	example(s) from : albino, tunica albica	Colours, shapes, and textures	Colours	Shades		1 - White
alco-	alco-	Alcohol.		Chemical substances	Functional groups
alder-	alder-	Of all, having the greatest degree of something.		Abstract	Ranking
aldo-	aldo-	Aldehyde.		Chemical substances	Functional groups
aleuro-	aleuro-	Wheat flour.	e.g. aleurometer, aleurone	Chemical substances	Foods
algo-	alg-, alge-, alges-, algesi-, algesio-, algi-, algio-, algo-	Pain. Nociception.	example(s) from : analgesic	Body processes	Sensory
ali-	ali-	(anatomy) Lateral expansion.		Abstract	Spatial			Side
alk-	alk-	(chemistry) Used to form classification names for classes of organic compounds which contain a carbon skeleton but no aromatic rings. See e.g. alkyl, alkane.		Chemical substances	Forms
alkal-	alkal-, alkali-	(chemistry) Alkali, alkaline.		Chemical substances	Functional groups
all-	al-, all-	Complete, general.	e.g. all-knowing, all-important	Abstract	Composition			Whole
allanto-1	allant-1, allanto-1	Sausage-shaped. (anatomy).		Colours, shapes, and textures	Shapes			Cylindrical
allanto-2	allant-2, allanto-2	Relating to allantois.		Body parts	Membranes
alli-	alli-	(biology) Garlic, aliums.		Lifeforms	Plants
allo-01	allo-01	(biology) Nonself; nonself but of the same species.	e.g. allogeneous, allorecognition, alloimmunity	Abstract	Self
allo-02	allo-02	(immunology) Alloimmunity; transplantation of cells or tissues from one person to another.	e.g. alloresponse, alloreaction, alloresponsive	Body processes	Cellular processes
allo-03	allo-03	An arbitrary a member of a heterogenous-but-interrelated group.	e.g. alloalbumin, allomorph, alloidentical	Abstract	Composition
allo-04	allo-04	External, outside, or from a separate location.	e.g. allonomous, allochory, allogenic	Abstract	Spatial
allo-05	allo-05	(genetics) Hybridization of multiple species.	e.g. allohaploid, allopolyploid, allohexaploid	Abstract	Parenthood
allo-06	allo-06	(chemistry) Isomeric; especially, of amino acids having two chiral centres, the second diastereoisomer to be discovered or synthesized.	e.g. allolactose, allocholane, allobetulin	Abstract	Routing
allo-07	allo-07	Different, distinct, or other with respect to the root.	e.g. allosome, allonym, allocolonial	Abstract	Similarity			! Different
allo-08	allo-08	(pathology) Abnormal, defective with respect to the root.	e.g. allolalia, allochromasia, allorhythmia	Abstract: Correctness	Correctness	Goodness		! Bad
allo-09	allo-09	Unconventional, unusual, or unexpected.	e.g. allophone, alloparent, allophane	Abstract	Normality
allo-10	allo-10	Changed or modified.	e.g. allohistorical, alloplasm, allobar	Abstract	Influences
allo-11	allo-11	(chemistry) Synthetic, artificial.	e.g. alloprotein, allopurinol	Abstract: Correctness	Correctness	Genuine		! Artificial
allo-12	allo-12	Variety, heterogeneity.	e.g. allopelagic, allochronic, allocentric	Abstract	Similarity			! Variety
allo-13	allo-13	(linguistics) Alternative, variant in form.	e.g. allophony, allocher, allograph	Abstract	Similarity			! Different
allo-14	allo-14	(chemistry, mineralogy) Impure in composition.	e.g. allochromatic, allochromatic, allostratigraphy	Abstract: Correctness	Correctness	Purity		! Impure
allo-15	allo-15	(ethology) Alloparenting: parenting behaviours between animals who are biologically parent and child.	e.g. allosuck, allocare, allofather	Body processes	Reproduction
allo-16	allo-16	(LGBTQ) Not asexual; attracted to others.	e.g. alloromantic, alloerotic, allonormativity	Social facts	Political and social movements
alt-	alt-	Alternative.		Abstract	Similarity			! Different
alter-	alter-	Other, different, changed.		Abstract	Similarity			! Different
alto-	alto-	(meteorology) Relating to clouds of middle étage.		Weather and natural disasters	Weather
alumino-	aluminio-, alumino-	Aluminum.	e.g. aluminography, aluminosilicate	Chemical substances	Elements
alveolo-	alveol-, alveolo-	Alveolar.		Body parts	Cavities
ambi-1	ambi-1, ambo-1	Either, both.	e.g. ambidirectional, ambipolar, ambispective, ambifix	Abstract	Transcendence
ambi-2	ambi-2, ambo-2	On both sides.	e.g. ambifix, ambilateral, ambilineal	Abstract	Spatial
ambi-3	ambi-3, ambo-3	Intermediate between two categories.	e.g. ambisense, ambivert, ambisyllabicity	Abstract	Intermediate
ambi-4	ambi-4, ambo-4	Alternating between two categories.	e.g. ambilocal, ambivalent, ambiquitous	Abstract	Temporal
ambly-	ambly-, amblyo-	Dull, blunt, obtuse.		Abstract	Angles			Obtuse
amelo-	amelo-	(anatomy) Involving tooth enamel.		Body parts	Teeth
Americo-	Americo-, Amero-	America.		Proper nouns	Extant countries
amethyst-	amethyst-	(biology) Lavender, purple.		Colours, shapes, and textures	Colours	Hues		9 - Purple
amid-	amid-, amido-,	(chemistry) Containing an amino group -NH2),.		Chemical substances	Functional groups
amino-	amin-, amino-	Amines.		Chemical substances	Functional groups
ammonio-	ammonio-	Ammonium.		Chemical substances	Compounds
amnio-	amnio-	The amnion around a foetus.	example(s) from : amniocentesis	Body parts	Membranes
amoebo-	ameb-, amebo-, amoeb-, amoebo-, amœb-, amœbo-	Amoeba.		Lifeforms	Protists
amor-	amor-	Love, liking.		Body processes	Emotion
ampel-	ampel-, ampelo-	Vine or grape.		Lifeforms	Plants
amphi-1	amph-1, amphi-1, ampho-1	Located on the opposite side of, or referring to two distinct sides or ends of a region or object.	e.g. amphicontinental, amphitropical, amphicrania	Abstract	Spatial
amphi-2	amph-2, amphi-2, ampho-2	Either, both; having two distinct properties and able to function as either.	e.g. amphinucleolus, amphiphobic, amphithallic	Abstract	Transcendence
amphi-3	amph-3, amphi-3, ampho-3	Merging two forms, and/or the fusion or inheritance that results from the combination.	e.g. amphimixis, amphidiploid, amphisome	Abstract	Composition			Hybrid
amphi-4	amph-4, amphi-4, ampho-4	Surrounding, around, encircling.	e.g. amphicribral, amphigynous, amphiphyte	Abstract	Spatial
amphi-5	amph-5, amphi-5, ampho-5	Intermediate between two properties or characteristics.	e.g. amphiarthrosis, amphilogy, amphigamous	Abstract	Intermediate
amphi-6	amph-6, amphi-6, ampho-6	Happening in two stages.	e.g. amphibiotic, amphidromous	Abstract	Temporal
amphor-	amphor-	(biology) Shaped like an urn.		Colours, shapes, and textures	Shapes			Round
ampl-	ampl-	(taxonomy) Large, ample.		Abstract	Size			Big
amplexi-1	amplexi-1	Surrounded, encircled, entwined.		Abstract	Spatial			Surrounding
amplexi-2	amplexi-2	(biology) Amplexus mating.		Body processes	Reproduction
ampulla-	ampulla-	(biology) Bladder, flask.		Colours, shapes, and textures	Shapes			Round
amygdalo-	amygdal-, amygdalo-	Amygdala.		Body parts	Brain
amylo-	amyl-, amylo-	Starch.	example(s) from : amylase, amylophagia	Chemical substances	Biochemistry
an-	a-3, an-	Not.	e.g. anacidic, anhedral	Abstract	Similarity			! Different
ana-1	ana-1	Up, above.	e.g. anaglyph, anafront, anagogy	Abstract	Spatial			Upward
ana-2	ana-2	Again.	e.g. anabaptist, anataxis, anastatic	Abstract	Temporal
ana-3	ana-3	Backward in direction.	e.g. anagram, anaplasia, anaphase	Abstract	Spatial			Backward
ana-4	ana-4	Thoroughly.	e.g. anatomy, analysis	Abstract	Insufficiency
ana-5	ana-5	Against.	e.g. anachronism, anamodernism, anatoxin	Abstract	Polarity			Opposition
ana-6	ana-6	On the distal face of.	e.g. anaporate, anatreme, anacolpate	Abstract	Spatial
ana-7	ana-7	To grow or change in place; functionally similar.	e.g. anabranch, anagenesis, anagen	Abstract	Similarity
anarcha-	anarcha-, anarcho-	Anarchism, anarchy.		Social facts	Social and political movements
anatomico-	anatomico-, anatomo-	Anatomy.		Academic disciplines	Health sciences
anci-	anci-	Ancient.		Abstract	Temporal
andro-1	andr-1, andro-1	Human.	example(s) from : Android (robot)android, andrology, androgen	Lifeforms	Animals
andro-2	andr-2, andro-2	Man, male.	example(s) from : Android (robot)android, andrology, androgen	Life stages	Genders
anemo-	anem-, anemo-	Wind.		Weather and natural disasters	Weather
angio-	angi-, angio-	Blood vessels, lymph vessels.	example(s) from : angiogram, angioplasty	Body parts	Tubes and ducts
Anglo-	Anglo-, anglo-	England, English. Anglo-Saxon.	e.g. Anglophone	Proper nouns	Extant countries
anhydro-	anhydro-	(chemistry) Having had water removed.		Chemical substances	Derivatives
aniso-1	aniso-1	Unequal.	example(s) from : anisocytosis, anisotropic	Abstract	Similarity	Symmetry		! Different
aniso-2	aniso-2	Asymmetric.		Abstract	Similarity	Symmetry		! Different
ankylo-1	anchyl-1, anchylo-1, ancyl-1, ancylo-1, ankyl-1, ankylo-1	Crooked.	e.g. ankylosaurus, ankylosis	Abstract	Angles			Bent
ankylo-2	anchyl-2, anchylo-2, ancyl-2, ancylo-2, ankyl-2, ankylo-2	Fused, fusion.	e.g. ankylothecodont, ankylose, ankylurethria, ankyloblepharon	Abstract	Composition			Joining
ankylo-3	anchyl-3, anchylo-3, ancyl-3, ancylo-3, ankyl-3, ankylo-3	Stiff in movement.	e.g. ankylotic, ankyloglossia	Body processes	Pathological
annu-	ann-, annu-	Annual, yearly.		Celestial bodies and their rotations	Time periods
annulo-	annulo-	(anatomy) Relating to an annulus (ring).		Colours, shapes, and textures	Shapes			Round
ano-	ano-	(anatomy) Pertaining to the anus.		Body parts	Orifices
ante-1	ante-1	Prior to in time.	example(s) from : antebellum	Abstract	Temporal			6 - Preceding
ante-2	ante-2	In front of in space.	example(s) from : antepartum	Abstract	Spatial			Front
ante-3	ante-3	(anatomy) Anterior in location/direction.	example(s) from : anteorbital	Abstract	Spatial			Front
anteiso-	anteiso-	(chemistry) (of an aliphatic compound, especially a fatty acid) Having a branch on the antepenultimate carbon atom of a chain.		Chemical substances	Acids
antero-	anter-, anterio-, antero-	(anatomy) Nearer the front of the body.		Abstract	Spatial			Front
antho-	anth-, antho-	(botany) Pertaining to flowers.		Lifeforms	Plants
anthra-	anthra-	(chemistry) Derivatives of anthracene.		Chemical substances	Derivatives
anthraco-	anthrac-, anthraco-	Coal, charcoal.		Chemical substances	Materials
anthropo-1	anthro-1, anthrop-1, anthropo-1	Man, human.	e.g.: anthropology, anthrophilia, anthrosylvan, anthropocentric	Lifeforms	Animals
anthropo-2	anthro-2, anthrop-2, anthropo-2	Anthropology.	e.g. anthropolinguistics, anthroposociological	Academic disciplines	Societal
anti-1	ant-1, anti-1	Against, opposed to.	e.g. antiabortion, antiracism	Abstract	Polarity			Opposition
anti-2	ant-2, anti-2	Counteracting, neutralizing.	e.g. antiaircraft, antifreeze, antibacterial	Abstract	Negation
anti-3	ant-3, anti-3	The opposite of what is typically expected.	e.g. antihero, anticlimax, antichess	Abstract	Normality			Abnormal
anti-4	ant-4, anti-4	Physically opposite, reverse in position or direction.	e.g. anticlockwise, Antarctic	Abstract	Spatial
anti-5	ant-5, anti-5	A rival or counterpart to.	e.g. antipope, Antichrist	Abstract	Similarity
anti-6	ant-6, anti-6	(particle physics) Composed of antimatter.	e.g. antielectron, antigalaxy	Physical properties	Other physical properties
anti-7	ant-7, anti-7	(immunology) Reacting with immunoglobins found in the specified animal.	e.g. antirabbit, antihorse	Body processes	Cellular processes
antico-	antico-	Old, antiquated.		Abstract	Temporal			2 - Old
antiprismo-	antiprismo-	(chemistry) Eight atoms bound into a rectangular antiprism.		Colours, shapes, and textures	Shapes			Boxy
anxio-	anxio-	Anxiety.		Body processes	Emotion
aorto-	aort-, aortico-, aorto-	The aorta.		Body parts	Tubes and ducts
apeiro-	apeiro-	Infinite.		Abstract: Quantity	Numbers	Cardinal		Infinite
api-	api-	(biology) Bee, bees.		Lifeforms	Animals
apico-1	apic-1, apici-1, apico-1	Having a shape that has a tip, point, or apex; apical, pointy.	e.g. apicoplast, w:Apicophilicity, w:Homophoberia apicosa	Colours, shapes, and textures	Shapes			Spiky
apico-2	apic-2, apici-2, apico-2	(anatomy) The side of a body part (or organism) that is futher away from the substrate it is attached to.	e.g. apicocardiac, apicolateral, apicomedial	Abstract	Spatial
apico-3	apic-3, apici-3, apico-3	Articulated with the tip of the tongue.	e.g. apicoalveolar, apicodental, apicopalatal	Human activities	Language
apico-4	apic-4, apici-4, apico-4	(dentistry) Related to the root of a tooth.	e.g. apicocoronal, apicoectomy	Body parts	Teeth
aplano-	aplano-	Non-mobile, fixed.	e.g. aplanospore	Abstract	Motion
apo-01	ap-01, aph-01, apo-01	Lacking, without, scant.	e.g. aponeurosis, apomeiosis, apogamy	Abstract	Insufficiency
apo-02	ap-02, aph-02, apo-02	(biochemistry) An apoenzyme: an enzyme without its cofactor; associated apoproteins.	e.g. aporeceptor, apoflavoprotein, apomucin	Abstract	Composition
apo-03	ap-03, aph-03, apo-03	(biochemistry) Lacking a metallic unit.	e.g. apoglobin, apomyoglobin, apometalloprotein	Chemical substances	Forms
apo-04	ap-04, aph-04, apo-04	Not, opposite.	e.g. apotracheal, apogeotropic	Abstract	Polarity
apo-05	ap-05, aph-05, apo-05	Away from, outward, or apart in direction.	e.g. apocentromeric, apheliotropic, apophlegmatic, apopyle, apophysis	Abstract	Spatial
apo-06	ap-06, aph-06, apo-06	Removal, amputation.	e.g. apotemnophobia, apotemnophilia, apophallation	Abstract	Composition
apo-07	ap-07, aph-07, apo-07	Disjoint, separate.	e.g. apocarpous, aposepalous, apopetalous	Abstract	Influences
apo-08	ap-08, aph-08, apo-08	Different, distinct.	e.g. apomedication, apomorph	Abstract	Similarity			! Different
apo-09	ap-09, aph-09, apo-09	Exterior, outside of.	e.g. aposematism, apoplast	Abstract	Spatial
apo-10	ap-10, aph-10, apo-10	From, coming from.	e.g. apology, apocrypha, apodeme	Abstract	Origin
apo-11	ap-11, aph-11, apo-11	(organic chemisty) Derived from, or related to.	e.g. apoharmine, apocodeine, apomorphine	Abstract	Parenthood
apo-12	ap-12, aph-12, apo-12	Distant, far from, or apart in position.	e.g. apophyte, apomecometry	Abstract	Spatial
apo-13	ap-13, aph-13, apo-13	Furthest in position.	e.g. apocentric, apocenter, apastron	Abstract	Spatial
apo-14	ap-14, aph-14, apo-14	(astronomy) Apoapsis: the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.	e.g. apoposeidion, apouranion, apocytherion	Abstract	Spatial
apo-15	ap-15, aph-15, apo-15	To carry forth, to do.	e.g. approportionate, apoplexy, apotheosis	Abstract	Completion
appendico-	append-, appendic-, appendico-	Appendix.		Body parts	Tubes and ducts
après-	après-	(informal) Used to describe an event, phenomenon, etc. that occurs after a specified activity; after-.		Abstract	Temporal			7 - Following
aqua-	aqua-, aque-, aqui-	Water.		Chemical substances	Compounds
ar-	ar-	(chemistry) organic compounds that contain a carbon skeleton and one or more aromatic rings.		Chemical substances	Forms
arabino-	arabino-	Derived from arabinose.		Chemical substances	Derivatives
arabo-	arab-, arabo-	(biology) Gum arabic.		Chemical substances	Biochemistry
Arabo-	Arabo-	Arabic.	e.g. Arabophone	Proper nouns	Languages
arachno-	arach-, arachn-, arachno-	Arachnids, spiders.		Lifeforms	Animals
Aragono-	Aragono-	Aragon, Aragonese.		Proper nouns	Languages
Aralo-	Aralo-	The Aral Sea, or pertaining to it.		Proper nouns	Regions
Arameo-	Arameo-	Aram, Arameans.		Proper nouns	Historical countries
arbori-	arbor-, arbori-	Trees.		Lifeforms	Plants
arc-	arc-	(mathematics) Used to form the names of inverse trigonometric and hyperbolic functions, and also the symbols for these functions.	e.g. arcsin, arctan	Abstract	Angles
Arcado-	Arcado-	Arcadia.		Proper nouns	Historical countries
arch-1	arch-1, archa-1, arche-1, archi-1, archo-1	A title in a hierarchy which indicates a higher degree of rank than its suffix.	e.g. archeparch, archmarshal, archdiocese	Abstract	Ranking
arch-2	arch-2, archa-2, arche-2, archi-2, archo-2	Leading, foremost, primary, or principal; best at.	e.g. archantagonist, archmodernist, archcompetitor	Abstract: Correctness	Correctness	Goodness		> Best
arch-3	arch-3, archa-3, arche-3, archi-3, archo-3	(augmentative) Intensely, extremely, or exceptionally.	e.g. archfool, archracist, archnationalist	Abstract	Normality			Augmentative
arch-4	arch-4, archa-4, arche-4, archi-4, archo-4	Powerful, potent.	e.g. archmage, archwife, archvillain	Abstract	Potency
arch-5	arch-5, archa-5, arche-5, archi-5, archo-5	First; original.	e.g. archangel, archdevil, archsin	Abstract	Temporal
archaeo-	archae-, archaeo-, archaio-, archeo-, archæ-, archæo-	Ancient; antediluvian; archaic; old; prehistoric; primitive.		Abstract	Temporal
arct-1	arct-1, arcto-1	North, northern, arctic.		Abstract	Spatial			Cardinal
arct-2	arct-2, arcto-2	(biology) Bears.		Lifeforms	Animals
Arcto-	Arcto-	Of or relating to the Arctic.		Proper nouns	Regions
areo-	areo-	The planet Mars.		Celestial bodies and their rotations	Solar system
Aretino-	Aretino-	Arezzo.		Proper nouns	Historical countries
argento-	argento-	Silver.	e.g. argentic, argentiferous	Chemical substances	Elements
argo-	argo-	Argon.	e.g. argonium, argoxonium	Chemical substances	Elements
argyr-	argyr-, argyro-	Silver.	e.g. argyrose, argyric	Chemical substances	Elements
aristo-1	aristo-1	Upper class, nobility.	e.g. aristocide, aristocracy	Social facts	Social institutions
aristo-2	aristo-2	Aristocracy.	e.g. aristocratic, aristodemocracy, aristomonarchy	Social facts	Social and political movements
aristo-3	aristo-3	The best, superior, ideal.	e.g. aristophagist, aristophrenic, aristotype	Abstract	Ranking
arithmo-	arithmo-	Pertaining to numbers, arithmetic.		Academic disciplines	Mathematical
Armeno-	Armen-, Armeno-	Armenian, Armenia.		Proper nouns	Extant countries
arseno-	arseno-	Arsenic.	e.g. arsenous, arsonium	Chemical substances	Elements
arte-	arte-	(pharmacology) Used to form names of artemisinin-related compounds used as antimalarial agents.		Chemical substances	Pharmacological
arteri-	arteri-, arterio-	(medicine) Artery.	example(s) from : arteriole, artery	Body parts	Tubes and ducts
arteriolo-	arteriol-, arteriolo-	Arteriole, small artery.		Body parts	Tubes and ducts
arthr-1	arthr-1, arthro-1	(biology) Joint.	e.g. arthritis, arthroplasty, arthropod	Body parts	Joints
arthr-2	arthr-2, arthro-2	Articulation (speech).	e.g. dysarthrophonia	Human activities	Language
arti-	arti-, artio-	(biology) Even quantities .		Abstract: Quantity	Parity	Even		0
articul-	articul-	(anatomy) Joint.	example(s) from : Articulation	Body parts	Joints
Aryo-	Aryo-	Aryan.		Proper nouns	Historical countries
as-	as-	Away from.		Abstract	Spatial			Away
ascar-	ascar-	(medicine) Parasitic nematodal helminths of family Ascarididae.		Lifeforms	Animals
asco-	asc-, asci-, asco-	(biology) Ascus sac produced by ascomycete fungi.		Body parts	Gametes
aspergillo-	aspergill-, aspergillo-	(biology) aspergillus.		Lifeforms	Fungi
Assyro-	Assyro-	Assyria.		Proper nouns	Languages
astat-	astat-	Astatine.	e.g. astatane, astatide	Chemical substances	Elements
aster-1	aster-	Stars.		Celestial bodies and their rotations	General
aster-2	aster-	Star-shaped.		Colours, shapes, and textures	Shapes			Spiky
astheno-	asthen-, astheno-	(anatomy) Asthenia; weakness.		Body processes	Pathological
astragalo-	astragalo-	(anatomy) Pertaining to the astragalus, the anklebone.		Body parts	Bones
astro-	astr-, astro-	Star. celestial body.	example(s) from: astrobiology, astrology, astronomy	Celestial bodies and their rotations	General
Astur-	Astur-	Asturias, Asturian.		Proper nouns	Historical countries
at-	at-	At, close to, away, off.		Abstract	Spatial
atelo-	atel-, atelo-	Incomplete; unfinished; defective. (a- + telo-).	example(s) from : atelocardia	Abstract	Completion			Incomplete
athero-	ather-, athero-	(medicine) Arterial conditions that are characterised by gruel-like lesions.	example(s) from : atherosclerosis	Body processes	Pathological
atlanto-	atlant-, atlanto-, atlo-	Atlas. The uppermost vertebra of the cervical spine.		Body parts	Bones
atmo-	atmo-	Air, gas, steam.	e.g. atmosphere, atmometry, atmolysis	Physical properties	States of matter
atrio-	atri-, atrio-	Atrium of the heart.	example(s) from : atrioventricular	Body parts	Cavities
atrop-	atrop-, atropo-	(chemistry) Atropisomer.		Chemical substances	Forms
atto-	atto-	10−18.		Abstract: Quantity	Numbers	Factors		10−18
aud-	aud-	Hearing, listening.		Body processes	Sensory
audio-	audio-	Pertaining to sound, audio.		Body processes	Sensory
aur-	aur-, auro-	(medicine) Ear.	example(s) from : Aural	Body parts	Organs
auri-	aur-, auri-, auro-	Gold.	e.g. aurous, aurochloride	Chemical substances	Elements
auriculo-	auricu-, auriculo-	The auricle of the heart, or the external ear.		Body parts	Ears
Australo-	Australo-	Australia.		Proper nouns	Extant countries
austro-	austral-, australo-, austro-	South, southern.		Abstract	Spatial			Cardinal
Austro-	Austro-	Austria.	e.g. Austrophile, Austro-Hungarian	Proper nouns	Extant countries
auto-1	aut-1, auto-1	Regarding oneself.	example(s) from : autoimmune, autograph, autobiography	Abstract	Self
auto-2	aut-2, auto-2	Automatic technology.	e.g. autofocus, autowalk	Technologies	Types of technologies
auto-3	aut-3, auto-3	Car, driving.	e.g. autocross, autophile	Technologies	Transportation
auxo-	aux-, auxo-	Growth, increase.	example(s) from : Auxocardia: enlargement of the heart, auxology	Abstract	Rates
avi-	avi-	Birds, avians; flight.		Lifeforms	Animals
axi-	axi-	Relating to the axis.	e.g. axi-symmetric	Abstract	Basis
axillo-	axill-, axillo-	(anatomy) Armpit .	example(s) from : Axilla	Body parts	Anatomical regions
axo-	ax-, axio-, axo-	Axis or axon.		Body parts	Nerves
aza-	aza-	(chemistry) Used to form names of organic compounds where an atom is replaced by a nitrogen atom.		Chemical substances	Substituents
Azero-	Azero-	Azerbaijani, Azerbaijan.		Proper nouns	Extant countries
azido-	azido-	(chemistry) Having an azide group (N-=N+=N-)as a substituent. Based on an azo compound (-N=N-).		Chemical substances	Substituents
azo-	az-, azo-, azoto-	(chemistry) Nitrogen.	e.g. azobenzene, azophilic	Chemical substances	Elements

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Prefixes that start with B.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
bacillo-	bacillo-	Bacillus.		Lifeforms	Bacteria
back-	back-	Behind an object/structure (locative/directional).	example(s) from: backhoe, backfire	Abstract	Spatial			Behind
bacterio-	bacter-, bacteri-, bacterio-	Bacteria, bacterial things, bacteriology.	example(s) from: bacteriophage, bactericide	Lifeforms	Bacteria
balano-	balan-, balano-	The glans (penis or clitoris).	example(s) from: balanitis	Body parts	Organs
Balkano-	Balkano-	Pertaining to the Balkans.		Proper nouns	Regions
balneo-	balneo-	Bath, bathing.	e.g. balneotherapeutics	Human activities	Healing
Balto-	Balto-	Baltic.		Proper nouns	Regions
Bangla-	Bangla-	Bangladesh, Bangladeshi.	e.g. Banglaphone.	Proper nouns	Extant countries
bario-	bario-	(mineralology) Used to form the names of minerals in which an element has been replaced by barium.		Chemical substances	Substituents
baro-	bar-, baro-, bary-	Pressure, heaviness.		Abstract	Mass
baryo-	baryo-	(physics) Baryon.		Particles	Particles
baryto-1	baryto-1	Containing baryta.		Chemical substances	Derivatives
baryto-2	baryto-2	Relating to barium.	e.g. barytocalcite	Chemical substances	Elements
basi-	bas-, basi-, baso-	Base, basis.	example(s) from: basolateral	Abstract	Basis
basidio-	basidio-	Basidium.		Lifeforms	Fungi
Bastulo-	Bastulo-	Bastetani.		Proper nouns	Historical countries
Bat-	Bat-, bat-	(media) Belonging to or associated with Batman.		Proper nouns	Popular culture
Batavo-	Batavo-	Relating to the Netherlands and Dutch culture.	e.g. Batavaphone	Proper nouns	Extant countries
bathy-1	batho-1, bathy-1	Deep.		Abstract	Size			Deep
bathy-2	batho-2, bathy-2	Deep sea.		Landforms and ecosystems	Oceanic
Bavaro-	Bavaro-	Bavarian, Bavaria.		Proper nouns	Historical countries
be-1	be-1	(non-productive) By, near, next to, around, close to.	e.g. beleaguer, bestand, beset, besit	Abstract	Spatial
be-2	be-2	(non-productive) Around; about.	e.g. begather, belay, belook, bestir, belive, besmell, bewrap	Abstract	Spatial
be-3	be-3	(non-productive) About, regarding, concerning, over.	e.g. bewrite, betalk, betell, belie, bemoan, bemourn, bewail, beknow, besing, bespeak	Abstract	Regarding
be-4	be-4	(non-productive) On, upon, at, to, in contact with something.	e.g. beclothe, becall, besee, behold, befall, bedo, beshine, besmile, betone	Abstract	Influences			Touch
be-5	be-5	(non-productive) Off, away, over, across.	e.g. becut, bedeal, betake, bego, behead, belimb, benim, bereave, besleeve, betrunk	Abstract	Spatial
be-6	be-6	(non-productive) As an intensifier; i.e. thoroughly, excessively; completely; utterly.	e.g. bebreak, begladden, belabour, behate, bedazzle	Abstract	Normality			Intensifying
be-7	be-7	(non-productive) All around; about; abundantly; all over.	e.g. belave, belick, bescatter, bekiss	Abstract	Completion
be-8	be-8	(non-productive) Forming verbs derived from nouns or adjectives, usually with the sense of "to make, become, or cause to be".	e.g. becalm, bedark, befree, befriend, bedim, beken, benight, benothing, bewet, besmooth, bestrange	Abstract	Completion
be-9	be-9	(archaic or informal) Used to intensify adjectives meaning "adorned with something", often those with the suffix -ed.	e.g. besequined, befeathered, beclawed, bewebbed, betasseled, beloved	Abstract	Covering
Belaruso-	Belaruso-	Belarus, Belarussian.	e.g. Belarusophone	Proper nouns	Extant countries
Belgo-	Belgo-	Belgian; of or pertaining to Belgium or its people.		Proper nouns	Extant countries
bellig-	bellig-	War, fighting.		Human activities	Other human activities
bene-	bene-	Good, well.		Abstract: Correctness	Correctness	Goodness		= Good
benoz-	benz-, benzo-	(chemistry) Benzene, six-carbon aromatic ring.		Chemical substances	Functional groups
Berbero-	Berbero-	Berber.	e.g. Berberophone	Proper nouns	Languages
Berkeleio-	Berkeleio-	Berkeleian.		Proper nouns	Religions/philosophies
beryl-	beryl-	Beryllium.	e.g. beryllide, beryllocene	Chemical substances	Elements
Betico-	Betico-	Andalusia.		Proper nouns	Historical countries
bi-01	bi-01, bin-01, bis-01	Two in number.	e.g. biarticular, biaxial	Abstract: Quantity	Numbers	Cardinal		2
bi-02	bi-02, bin-02, bis-02	Having or possessing two of the suffixed quality.	e.g. biangular, biantheriferous, bicardial	Abstract	Composition
bi-03	bi-03, bin-03, bis-03	Both: referring to two as a set.	e.g. biacetabular, biallelic, bicaval	Abstract	Composition
bi-04	bi-04, bin-04, bis-04	Being different in two ways with respect to the suffix.	e.g. biadjoint, biaffine, biclonal	Abstract	Influences
bi-05	bi-05, bin-05, bis-05	Forked, divided by two, halved; (chemistry, proscribed) half.	e.g. bifurcate, bicapitate, bicarinate	Abstract: Quantity	Numbers	Cardinal		0.5
bi-06	bi-06, bin-06, bis-06	Double, twofold.	e.g. bialgebroid, bifarious, biarticulated	Abstract: Quantity	Numbers	Multiplier		2
bi-07	bi-07, bin-07, bis-07	(LGBTQ) Bisexual, relating to bisexuality.	e.g. bicentric, biphobia, biromantic	Social facts	Political and social movements
bi-08	bi-08, bin-08, bis-08	(anatomy) Bilateral, on both sides of the body.	e.g. biconcave, biballism	Abstract	Spatial
bi-09	bi-09, bin-09, bis-09	Twice.	e.g. biannual, biannual, biconjugate	Abstract: Quantity	Numbers	Multiplier		2
bi-10	bi-10, bin-10, bis-10	Every two.	e.g. biannual, bicentennial	Abstract: Quantity	Numbers	Multiplier		0.5
bi-11	bi-11, bin-11, bis-11	A pair of; composed of two.	e.g. bibrow, bicomplex	Abstract	Composition			2
biblio-	biblio-	Book.		Technologies	Communication technologies
bili-	bili-, bilio-	Bile.	example(s) from: Cholemiacholaemia (UK) / cholemia (US), cholecystitis	Body parts	Bodily fluids
bio-	bi-12, bio-	Life.	example(s) from: biology, biotic	Academic disciplines	Natural
bismuto-	bismuto-	(mineralology) Used to name minerals in which an element of another mineral is replaced by bismuth.		Chemical substances	Elements
blasto-	blast-, blasto-	Bud, budding, germination.	example(s) from: blastomere	Body processes	Reproduction
blenno-	blenno-	Mucus.		Body parts	Bodily fluids
blepharo-	blephar-, blepharo-	Eyelids.	example(s) from: blepharoplasty	Body parts	Integument
bora-	bora-	(chemistry) Describing any compound in which a carbon atom (or a >CH group) has been replaced by one of boron.		Chemical substances	Substituents
boreo-	boreo-	Northern.		Abstract	Spatial			Cardinal
boro-	boro-	Boron.		Chemical substances	Elements
Bosno-	Bosno-	Pertaining to Bosnia, Bosnians or the Bosnian lect.		Proper nouns	Extant countries
brachio-	brachi-, brachio-	Arms, branches.	e.g. brachioplasty, brachiopod, brachiocephalic	Body parts	Anatomical regions
brachy-	brachy-	Short.	example(s) from: brachycephalic	Abstract	Size			Short
brady-	brady-	Slowness.	e.g. bradycardia, bradygastria, bradyseism	Abstract	Rates			Slow
branchio-	branchio-	Gills.		Body parts	Organs
brepho-	brepho-	(rare) Baby.		Life stages	Life cycle
brevi-	brevi-	(anatomy) Short.		Abstract	Size			Short
Brit-	Brit-, Britanno-, Brito-	Britain, Britannia, British. Breton language.	e.g. Brittophone	Proper nouns	Extant countries
bromo-	brom-, bromo-	(chemistry) Bromine.		Chemical substances	Elements
broncho-	bronch-, bronchi-, bronchio-, broncho-	(medicine) Bronchus, trachea, airways to the lungs.	example(s) from: bronchitis, bronchiolitis obliterans	Body parts	Tubes and ducts
bronto-	bronto-	Thunder.		Weather and natural disasters	Weather
bryo-	bry-, bryo-	(botany) Pertaining to mosses.		Lifeforms	Plants
bucco-	bucc-, bucco-	Cheeks.	example(s) from: buccolabial	Body parts	Anatomical regions
Bulgaro-	Bulgaro-	Pertaining to Bulgaria, Bulgarians or the Bulgarian language.	e.g. Bulgarophone	Proper nouns	Extant countries
bur-	bur-	Fortification; used as a prefix for fortified locations.		Technologies	Warfare
Burmo-	Burmo-	Burma, Burmese.		Proper nouns	Extant countries
burs-	burs-, burso-	(medicine) bursa .	example(s) from: w:Synovial bursa, bursitis	Body processes	Pathological
but-	but-	(chemistry) Denotes the presence of four carbon atoms in the parent chain when forming names of organic compounds.		Chemical substances	Forms
butyro-	butyro-	(chemistry) Butyric substance.		Chemical substances	Derivatives
by-1	by-1, bye-1	Nearness or roundaboutness.	e.g. bystander, bypass	Abstract	Spatial			Near
by-2	by-2, bye-2	Secondary, incidental, or parallel to.	e.g. by-product, byform, by-path	Abstract	Ranking

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Prefixes that start with C.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
C-	C-	(media) Chinese; used to denote nouns relating to the (popular) culture of China.		Proper nouns	Popular culture
caco-	caco-	Bad.		Abstract: Correctness	Correctness	Goodness		! Bad
cadmi-	cadmi-	Cadmium.	e.g. cadmic, cadmiferous	Chemical substances	Elements
caeco-	caeco-, ceco-	(medicine) Cecum.		Body parts	Intestines
calcaneo-	calcaneo-	(anatomy) Calcaneus.		Body parts	Bones
calci-	calc-, calci-, calcio-, calco-	Calcium.		Chemical substances	Elements
calli-	calli-	Beautiful.		Abstract: Correctness	Correctness	Beauty		= Good
calor-	calor-	Heat.	e.g. calorimetry, calorific	Physical properties	Climactic conditions
Cambro-	Cambro-	Wales, Welsh.	e.g. Cambrophone	Proper nouns	Extant countries
Canaano-	Canaano-	Canaan.		Proper nouns	Historical countries
Canado-	Canado-	Canadian, Canada.		Proper nouns	Extant countries
canaliculo-	canaliculo-	(anatomy) Canaliculus (small passageway).		Body parts	Tubes and ducts
Cantabro-	Cantabro-	Cantabrian, Cantabria, Cantabri.		Proper nouns	Historical countries
cantho-	cantho-	Canthus; corner of the eye.		Body parts	Eyes
capill-1	capill-1	Shaped like hair.	example(s) from: capillus	Colours, shapes, and textures	Shapes			Filiform
capit-	capit-	Head.	example(s) from: capitation, decapitation	Body parts	Anatomical regions
capno-1	capno-1	Carbon dioxide.		Chemical substances	Compounds
carbo-	carb-, carbo-	(chemistry) Carbon.		Chemical substances	Elements
carcin-	carcin-, carcino-	Cancer.	example(s) from: carcinoma	Body processes	Pathological
carcinomato-	carcinomato-	Carcinoma.		Body processes	Pathological
cardi-	cardi-, cardio-	Heart.	example(s) from: cardiology	Body parts	Organs
cario-	cario-	Dental caries.		Body processes	Pathological
carn-	carn-	Flesh.		Body parts	Connective tissues
carotico-	carotico-	(anatomy) Of or relating to the carotid artery.		Body parts	Tubes and ducts
Carpatho-	Carpatho-	Carpathia.		Proper nouns	Historical countries
carpo-	carp-, carpo-	Area around human wrist.	example(s) from: carpal, carpopedal spasm, metacarpal	Body parts	Anatomical regions
carto-	carto-	Forms terms relating to maps.		Technologies	Communication technologies
cata-	cat-, cata-, kata-	Downwards movement, backwards, reverse.	example(s) from: catabolism, catacombs, cataract	Abstract	Spatial			Downward
Catalano-	Catalano-	Catalonia; relating to Catalan culture, Catalan people or the Catalan language.		Proper nouns	Languages
caudo-1	caudo-1	The tail.		Body parts	Anatomical regions
caudo-2	caudo-2	Tail-shaped.		Colours, shapes, and textures	Shapes			Cylindrical
caudo-3	caudo-3	In the direction of or proximity to a tail.		Abstract	Spatial			Back
cedr-	cedr-	(chemistry) Cedar.		Lifeforms	Plants
cef-	cef-	(pharmacology) Used to form names of cefalosporanic acid derivative used as antibiotics.		Chemical substances	Pharmacological
Celto-	Celto-	Celtic.		Proper nouns	Languages
cen-	cen-	Most recent common (e.g. most recent common ancestor).		Abstract	Temporal			2 - Old
ceno-	ceno-	New, recent.		Abstract	Temporal			3 - New
centi-	cent-, centi-	Hundred, one-hundredth. 10-2.		Abstract: Quantity	Numbers	Factors		10-2
centro-	centr-, centri-, centro-	Centre, especially of mass nouns.		Abstract	Spatial			Centre
cephalo-	cephal-, cephalo-	(biology) Brain or head.	example(s) from: cephalalgy, hydrocephalus	Body parts	Anatomical regions
cer-	cer-	Cerium.	e.g. cerate, cerous	Chemical substances	Elements
cerato-	cerat-, cerato-, kerato-	(medicine) Horned, horn-like.	example(s) from: Ceratoidceratoid	Body parts	Integument
cerauno-	cerauno-	Thunderbolt, thunder, lightning.		Weather and natural disasters	Weather
cerebello-	cerebell-, cerebello-	Cerebellum.	example(s) from: cerebellum	Body parts	Brain
cerebro-	cerebro-	The brain.	example(s) from: cerebrology	Body parts	Brain
cero-	cero-	Wax.	e.g. cerotype, ceroma, ceraceous	Chemical substances	Materials
cervico-	cervic-, cervici-, cervico-	The cervix; neck.	example(s) from: cervical vertebrae, cervicodorsal	Body parts	Anatomical regions
ceta-	ceta-	Whales.		Lifeforms	Animals
Chado-	Chado-	Chadian, Chad.		Proper nouns	Extant countries
chaeto-	chaeto-	Hair.		Body parts	Integument
chalco-	chalco-	Copper, brass. ore.		Chemical substances	Elements
Checheno-	Checheno-	Chechen.		Proper nouns	Languages
cheilo-	cheil-, cheilo-	Lips.	example(s) from: angular cheilitis	Body parts	Anatomical regions
cheli-	cheli-	Claws.		Body parts	Integument
chemo-	chem-, chemi-, chemico-, chemo-	Chemicals, chemistry.	example(s) from: chemical, chemistry, chemotherapy	Academic disciplines	Natural
chilia-	chilia-	Thousand.		Abstract: Quantity	Numbers	Factors		103
chion-	chion-	Snow.		Weather and natural disasters	Weather
chiro-1	cheir-1, cheiro-1, chir-1, chiro-1	Hand.	e.g. chiralgia, chiropatagium	Body parts	Anatomical regions
chiro-2	cheir-2, cheiro-2, chir-2, chiro-2	Sign language.	e.g. chireme, chirogram, chirology	Human activities	Language
chiroptero-	chiroptero-	Relating to bats (the flying mammal).		Lifeforms	Animals
chlamydo-	chlamydo-	(biology) Denoting an outer covering (cortex) such as a rigid cell wall, or a frilled neck.	e.g. chlamydia, chlamydospore, Chlamydosaurus, Chlamydoselachus	Body parts	Integument
chloro-1	chlor-1, chloro-1	Green.	e.g. chlorosis, chlorophyll, chlorella	Colours, shapes, and textures	Colours	Hues		4 - Green
chloro-2	chlor-2, chloro-2	(chemistry) Chlorine.	e.g. chloracetamide, chlorocalcite	Chemical substances	Elements
chloroformyl-	chloroformyl-	(chemistry) Molecule containing a chloroformyl group which consists of a formyl group (-CO-H, also called aldehyde), in which the hydrogen is substituted by a chlorine atom (-CO-Cl). Also called acyl chloride.		Chemical substances	Substituents
choano-	choan-, choano-	Funnel.		Colours, shapes, and textures	Shapes			Conical
cholangio-	cholangio-	(anatomy) Bile duct.		Body parts	Tubes and ducts
chole-	chol-, chole-	(medicine) Pertaining to bile or its production.		Body parts	Bodily fluids
cholecysto-	cholecyst-, cholecysto-	(medicine) Relating to the gall bladder.	example(s) from: cholecystectomy	Body parts	Organs
choledocho-	choledoch-, choledocho-	Common bile duct.		Body parts	Tubes and ducts
chondro-1	chondrio-1, chondro-1	Grains.	e.g. chondrometer	Chemical substances	Foods
chondro-2	chondrio-2, chondro-2	(medicine) Cartilage.	e.g. chondrodynia, chondroinductive, chondroprotein	Body parts	Connective tissues
choreo-	choreo-	Dance, dancing.		Human activities	Types of media
chorio-	chorio-	The chorion.		Body parts	Membranes
choro-	choro-	Place.		Abstract	Basis
Christo-	Christiano-, Christo-	Christian, Christ.		Proper nouns	Religions/philosophies
chromato-	chromat-, chromato-, chromo-1	Colour.	example(s) from: hemochromatosis	Physical properties	Other physical properties
chromo-2	chromo-2	Chromium.		Chemical substances	Elements
chrono-	chron-, chrono-	Time.		Academic disciplines	Natural
chrys-	chrys-, chryso-	Yellow.		Colours, shapes, and textures	Colours	Hues		3 - Yellow
Chukotko-	Chukotko-	Chukchi, Chukotka.		Proper nouns	Historical countries
chylo-	chylo-	(medicine) Chyle.		Body parts	Bodily fluids
cili-	cili-, cilio-	(biology) Cilium.	e.g. ciliogenesis, ciliopathy	Body parts	Cellular
cine-	cine-	Pertaining to film, movies, cinema.		Human activities	Types of media
cingulo-	cingulo-	(anatomy) Cingulum.		Body parts	Brain
circum-	circum-	Around.	example(s) from: circumlocution, circumnavigate, circumference	Abstract	Spatial			Around
cirrh-	cirrh-, cirrho-	Orange.		Colours, shapes, and textures	Colours	Hues		2 - Orange
cirro-	cirro-	A tuft, curl, or tendril.		Colours, shapes, and textures	Shapes			Curly
cis-1	cis-1	(geography) On this side of.	e.g. cisalpine, cisrhenane, Ciscaucasia	Abstract	Spatial
cis-2	cis-2	(chemistry) Forming names of chemical compounds in which two atoms or groups are situated on the same side of some plane of symmetry passing through the compound.	e.g. cis-diazene	Abstract	Spatial
cis-3	cis-3	(gender) Being, or pertaining to being, cisgender or cissexual.	e.g. cisgender, cissexism, cisnormativity	Social facts	Political and social movements
citra-	citra-	On this side of; hither.		Abstract	Spatial			Hither
clado-	clado-	A branch, or branching.		Abstract	Routing
claustro-	claustro-	Enclosed space.		Abstract	Covering
cleido-	cleido-	Clavicle.		Body parts	Bones
climo-	climo-	Climate; weather patterns.		Physical properties	Climactic conditions
clinico-	clinico-	(medicine) Clinic; clinical.		Social facts	Social institutions
clino-	clino-	Inclined.		Abstract	Angles
clostr-	clostr-	(anatomy) Spindle, spindle-shaped.	example(s) from: Clostridium	Colours, shapes, and textures	Shapes			Yonic
co-01	co-01	Jointly: the suffix is done in coordination between multiple actors or entities.	e.g. coadoption, coadapt, coanalysis	Abstract	Influences
co-02	co-02	Along with: the suffix is done along with or in addition to others.	e.g. coassemble, coadhesion, coadsorb	Abstract	Composition
co-03	co-03	Mutually: the suffix is done in a way that is reciprocal and bidirectional.	e.g. coadherence, coattraction, coannihilate	Abstract	Influences
co-04	co-04	Simultaneously, done or able to do at the same time.	e.g. cobirthing, cosexual, cocluster, coagglutination	Abstract	Temporal
co-05	co-05	Spatially located or positioned together, co-located.	e.g. cocirculate, coarctate, coattend	Abstract	Spatial
co-06	co-06	In conjunction: the suffix needs another entity to take effect, or there is a one-way interaction between them.	e.g. coantioxidant, codepletion, comedication	Abstract	Influences
co-07	co-07	Moving or oriented in the same direction; co-directional.	e.g. coflowing, cocurrent, coalign	Abstract	Spatial
co-08	co-08	Gender-mixed; having men and women together for the suffixed activity or location.	e.g. co-corrections, co-educate	Abstract	Composition
co-09	co-09	Having commonality, similarity with respect to the suffix.	e.g. coaxial, cobelligerent, coaltitude	Abstract	Similarity			= Similar
co-10	co-10	Coequal, equal in rank.	e.g. coadministrator, coassessor, cocaptain	Abstract	Ranking
co-11	co-11	Indicating a family relationship that indicates a common rank made through three degrees of separation, the middle of which is by marriage.	e.g. co-sister, co-parent-in-law	Abstract	Parenthood
co-12	co-12	Equally, equal with respect to the suffix.	e.g. cointense, codominant, coextension	Abstract	Similarity			= Equal
co-13	co-13	(mathematics) Homomorphic with respect to the suffix.	e.g. cocharacter, cofree, cohyponormal	Abstract	Similarity			= Similar
co-14	co-14	During the same time period as the suffix.	e.g. coseasonal, coseismic, cotemporality	Abstract	Temporal
co-15	co-15	(mathematics) Dual or complement.	e.g. coaltitude, colatitude, cocategory, coarea	Abstract	Negation
co-16	co-16	Having multiple targets or effects; the suffix affects or involves multiple subjects.	e.g. coaccused, coaccumulation, coadsorption	Abstract	Scope
co-17	co-17	Secondary or auxiliary in rank or priority.	e.g. copilot, coabuser, cofeature, coname	Abstract	Ranking
co-18	co-18	(biochemistry) Referring to coenzymes.	e.g. coglucosidase, coprotease, codehydrogenase	Chemical substances	Biochemistry
co-19	co-19	(organic chemistry) Referring to copolymers.	e.g. codimer, copolypeptide, comonomer	Chemical substances	Forms
co-20	co-20	(chemistry) Deriving from multiple sources.	e.g. copolymer, cointercalation, coconformation	Abstract	Origin
coagulo-	coagulo-	Blood coagulation.		Body processes	Pathological
cobalti-	cobalti-	(chemistry) Cobaltic.		Chemical substances	Elements
cobalto-	cobalto-	(chemistry) Cobaltous.		Chemical substances	Elements
cochleo-	cochleo-	Cochlea.		Body parts	Ears
coelo-1	cele-1, celo-1, coel-1, coelo-1, cœlo-1	Hollow, cavity.		Abstract	Landmarks
coelo-2	cele-2, celo-2, coel-2, coelo-2, cœlo-2	(medicine) Abdominal cavity.		Body parts	Cavities
coen-	coen-, coeno-, cœn-, cœno-	Common.		Abstract	Normality			Normal
colliculo-	colliculo-	Pertaining to the inferior colliculus or superior colliculus.		Body parts	Brain
colo-	colo-, colono-	The colon.		Body parts	Intestines
Colombo-	Colombo-	Colombia.		Proper nouns	Extant countries
colp-	colp-, colpo-	Vagina.	example(s) from: colposcopy	Body parts	Organs
combi-	combi-	(rare) Combination.		Abstract	Composition			Joining
con-01	col-01, com-01, con-01, cor-01	Unite: to unite into a collection indicated by the suffix.	e.g. concorporate, conglobulate, conglutination	Abstract	Composition			Joining
con-02	col-02, com-02, con-02, cor-02	Together: the suffixed entity is done together.	e.g. conarticular, conjubilant, consubsistence	Abstract	Influences			Together
con-03	col-03, com-03, con-03, cor-03	Having commonality, having the same property indicated by the suffix.	e.g. confocal, consimilar, conterminant	Abstract	Similarity			= Similar
con-04	col-04, com-04, con-04, cor-04	Belonging to the same group indicated by the suffix.	e.g. confamilial, contypic, conspecific	Abstract	Composition			Among
con-05	col-05, com-05, con-05, cor-05	Synchronous or simultaneous with the suffix.	e.g. connascent, concreate, congeneration	Abstract	Temporal
con-06	col-06, com-06, con-06, cor-06	A fellow kind of the suffix.	e.g. concitizen, condisciple, concelebrant	Abstract	Ranking
con-07	col-07, com-07, con-07, cor-07	To do the suffix.	e.g. convivify, confix, constrict	Abstract	Completion
con-08	col-08, com-08, con-08, cor-08	Intensifying the suffix.	e.g. congenial, connatural, convicinity	Abstract	Normality			Intensifying
con-09	col-09, com-09, con-09, cor-09	Found with. What is found with the suffix.	e.g. consalazinic acid, conphaseolin, connegative	Abstract	Spatial
con-10	col-10, com-10, con-10, cor-10	From, coming from the suffix.	e.g. consequence, convicine, connatal	Abstract	Origin
con-11	col-11, com-11, con-11, cor-11	When one entity is put into another, or one entity affects the other.	e.g. conplastic, converb	Abstract	Influences			One-way
con-12	col-12, com-12, con-12, cor-12	Mutuality, indicating a reciprocal relationship or influence.	e.g. confraternization, confated, connascence	Abstract	Influences			Mutual
con-13	col-13, com-13, con-13, cor-13	To surround or adorn with.	e.g. constrict, constellate	Abstract	Spatial
con-14	col-14, com-14, con-14, cor-14	Uniform, or made to be the same as.	e.g. concolorate	Abstract	Similarity			= Uniform
con-15	col-15, com-15, con-15, cor-15	constructed, artificial, hypothetical, fictional.	e.g. conlang, conworld, conculture	Abstract: Correctness	Correctness	Genuine		! Artificial
condylo-	condylo-	(anatomy) Condyle.		Body parts	Bones
Congo-	Congo-	Congo region/countries.		Proper nouns	Extant countries
conico-	conico-	Somewhat resembling a cone.		Colours, shapes, and textures	Shapes			Conical
cono-	cono-	Of or pertaining to a cone.		Colours, shapes, and textures	Shapes			Conical
contra-	contra-, contre-, contro-	Against.	example(s) from: contradict, contraindication	Abstract	Polarity			Opposition
copr-	copr-, copro-	Excrement, dung.		Body processes	Bodily needs and functions
Copto-	Copto-	Coptic.		Proper nouns	Languages
coraco-	coraco-	(anatomy) Coracoid process.		Body parts	Bones
cordi-	cord-, cordi-	(anatomy) Heart. .	example(s) from: commotio cordis,	Body parts	Organs
coreo-	coreo-	Pupil of the eye.		Body parts	Eyes
corneo-	corneo-	(anatomy) Cornea.		Body parts	Eyes
cornu-	cornu-	(anatomy) Horn-shaped, horn-like.	example(s) from: greater cornu	Colours, shapes, and textures	Shapes			Curly
Cornu-	Cornu-	Cornwall.		Proper nouns	Historical countries
coron-	coron-, corona-, corono-	Crown, crown-shaped.	example(s) from: coronary heart disease	Colours, shapes, and textures	Shapes			Spiky
corporo-	corporo-	Body.		Body parts	Anatomical regions
Corso-	Corso-	Corsica, Corsican.		Proper nouns	Historical countries
cort-	cort-	(pharmacology) Used to form names of corticosteroids except prednisolone derivatives.		Chemical substances	Pharmacological
cortico-	cortic-, cortico-	Cortex, usually the adrenal cortex or the cerebral cortex.	example(s) from: corticosteroid	Body parts	Brain
cosmo-	cosmo-	The universe, cosmos, world.		Celestial bodies and their rotations	General
cost-	cost-, costo-	Ribs.	example(s) from: costochondral	Body parts	Bones
counter-	counter-	In opposition to.	example(s) from: counteract, counterpart	Abstract	Polarity			Opposition
cox-	cox-	(anatomy) The hips, hip joint.	example(s) from: coxopodite	Body parts	Anatomical regions
cran-	cran-	Cranberry.		Lifeforms	Plants
cranio-	crani-, cranio-	Cranium.	example(s) from: craniology	Body parts	Brain
crico-	crico-	(anatomy) Of or pertaining to the cricoid cartilage.		Body parts	Connective tissues
Crimeo-	Crimeo-	Crimea, Crimean.		Proper nouns	Historical countries
Croato-	Croato-	Croatia, Croatian.		Proper nouns	Extant countries
crono-	crono-	The planet Saturn.		Celestial bodies and their rotations	Solar system
cross-01	cross-01	Shaped like a cross or X; crossing lines.	e.g. crossbody, crossbuck, cross-stitch	Colours, shapes, and textures	Shapes			Cross
cross-02	cross-02	Perpendicular in angle; transverse.	e.g. crossbedding, crossband, crossmember	Abstract	Angles			Perpendicular
cross-03	cross-03	Moving from one side to the other; across. Often diagonal.	e.g. crossfield, cross-city, crossbelt, crosscourt	Abstract	Spatial			Across
cross-04	cross-04	(figurative) Moving from one track or state to another.	e.g. crossfeed, crossfader, cross-link	Abstract	Intermediate
cross-05	cross-05	On the opposite side of.	e.g. crosstown, cross-cousin, cross-ratio	Abstract	Spatial			Opposite
cross-06	cross-06	Moving or acting against, opposing, contrary.	e.g. crossflow, cross-beat, cross-vote	Abstract	Polarity			Opposition
cross-07	cross-07	Located in between. Often, but not necessarily, forming an H-shaped structure.	e.g. cross-passage, cross-tunnel, crossfire	Abstract	Spatial			Between
cross-08	cross-08	More than one, often in indicating applicability to several domains that are usually separate.	e.g.crosslingual, cross-browser, crossfunctional, cross-cultural	Abstract	Influences			Multiple
cross-09	cross-09	Involving two or more at the same time; coincident.	e.g. crossbreak, crosspost, crosscurrent	Abstract	Temporal
cross-10	cross-10	Comparing two sources of information, often to verify their contents.	e.g. crossdate, crossvalidated, crosscovariance	Abstract	Influences	Fixing
cross-11	cross-11	To combine two entities to create a hybrid.	e.g. crossbreed, cross-pollinate, crosslinear	Abstract	Composition			Hybrid
cross-12	cross-12	Mutual exchange or influence, where both entities are affected in the same way. Mutuality.	e.g. crosstalk, crossrepression, crosscalibration, cross-progress	Abstract	Influences			Mutual
cross-13	cross-13	One entity affecting a similar entity, such as to transfer of one property from one entity to the other.	e.g. crossregulation, crossfeed, crossprotection	Abstract	Influences			Transferal
cross-14	cross-14	Alternate, different.	e.g. cross-tune, cross-birth, cross-live	Abstract	Similarity			! Different
cruro-	cruro-	(anatomy) Relating to a limb or a hiatus.		Body parts	Anatomical regions
cryo-1	cry-1, cryo-1	Cold, freezing.	e.g. cryopedology, cryovolcano, cryopulverization	Physical properties	Climactic conditions
cryo-2	cry-2, cryo-2	The perception of cold.	e.g. cryalgesia	Body processes	Sensory
cryo-3	cry-3, cryo-3	Cryonics.	e.g. cryonicist	Technologies	Types of technologies
crypto-	crypt-, crypto-	Hidden, secret.	example(s) from: cryptography	Abstract	Covering
crystallo-	crystallo-	Crystal.	e.g. crystallogeny, crystallometry	Chemical substances	Materials
cteno-	cteno-	Comb, comb-shaped.		Colours, shapes, and textures	Shapes			Branching
cubito-	cubito-	Elbow.		Body parts	Anatomical regions
culdo-	culdo-	Cul-de-sac of Douglas, rectouterine pouch.		Body parts	Cavities
cuneo-	cuneo-	Cuneate; cuniform.		Technologies	Communication technologies
cupro-	cupr-, cupro-	Copper.		Chemical substances	Elements
cutane-	cutane-	Skin.	example(s) from: Subcutaneous tissuesubcutaneous	Body parts	Integument
cyan-1	cyan-1, cyano-1	Dark blue-green in color.	example(s) from: cyanopsia, cyanosis	Colours, shapes, and textures	Colours	Hues		5 - Teal
cyan-2	cyan-2, cyano-2	(chemistry) Derived from cyanogen, cyanide.	e.g. cyanamide, cyanic acid	Chemical substances	Derivatives
cyber-	cyber-	Computer. cyberspace.		Technologies	Communication technologies
cycl-1	cycl-1, cyclo-1	Circle.	example(s) from: cyclosis, cyclops, tricycle	Colours, shapes, and textures	Shapes			Round
cycl-2	cycl-2, cyclo-2	Cycle, cyclical.	example(s) from: cyclosis, cyclops, tricycle	Abstract	Temporal
cycl-3	cycl-23, cyclo-3	(chemistry) Cyclic compound.	example(s) from: cyclosis, cyclops, tricycle	Chemical substances	Forms
Cymro-	Cymro-	Wales, Welsh.	e.g. Cymrophone	Proper nouns	Extant countries
cyn-	cyn-, cyno-	Pertaining to dogs.		Lifeforms	Animals
cyph-	cyph-, cypho-	Bent, crooked.	example(s) from: cyphosis	Abstract	Angles			Bent
Cypro-	Cypro-	Cyprus; Cypriot.		Proper nouns	Extant countries
cyrto-	cyrto-	Curved, convex.	e.g. cyrtometer, cyrtostyle	Abstract	Angles			Convex
cysto-	cyst-, cysti-, cysto-	The bladder.	example(s) from: cystotomy	Body parts	Organs
cythero-	cythero-	(astronomy) Relating to Venus.		Celestial bodies and their rotations	Solar system
cyto-	cyt-, cyto-	(biology) Cell.	example(s) from: cytokine, leukocyte, cytoplasm	Body parts	Cellular
Czecho-	Czecho-	Czech Republic.; Czech.; (obsolete) Czechoslovakia.	e.g. Czechophone	Proper nouns	Extant countries

D

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D

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References

Prefixes that start with D.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
Daco-	Daco-	Dacian.		Proper nouns	Historical countries
dactyl-	dactyl-, dactylo-	Fingers or toes.		Body parts	Anatomical regions
Dalmato-	Dalmato-	Pertaining to Dalmatia or Dalmatian.		Proper nouns	Historical countries
Dano-	Dano-	Pertaining to Denmark, Danish or the Danes.	e.g. Danophone	Proper nouns	Extant countries
dasy-1	dasy-1	Hairy.	e.g. dasypygal	Body parts	Integument
dasy-2	dasy-2	Dense.		Abstract	Mass			Dense
de-1	de-1	Reversal, undoing.	e.g. decouple, de-ice, dehumidify	Abstract	Transcendence
de-2	de-2	Removing, to remove from.	e.g. debenzylate, dearterialization, deallocate, detrain	Abstract	Composition			Un-joining
de-3	de-3	Intensifying.	e.g. defraud, denumerate, depauperize	Abstract	Intensity
de-4	de-4	From, off, derived from.	e.g. deverbal, deadjectival	Abstract	Origin
deca-	dec-, deca-, decakis-, deka-	Ten. 10.		Abstract: Quantity	Numbers	Cardinal		10
deci-	deci-	Tenth part. 10-1.		Abstract: Quantity	Numbers	Factors		10-1
dehydro-	dehydro-	(chemistry) Used to form the names of compounds that have lost one or more hydrogen atoms, especially those that have lost even numbers of hydrogen atoms to form double bonds.		Chemical substances	Forms
deipno-	deipno-	Dinner, banquet.		Human activities	Other human activities
demi-1	demi-1	Half.	example(s) from: demigod	Abstract: Quantity	Numbers	Cardinal		0.5
demi-2	demi-2	One that partly belongs to.	example(s) from: demigod	Abstract	Composition			Part
demo-1	demo-1	People, the public.	e.g. democracy, demolatry, demonym	Social facts	Social institutions
demo-2	demo-2	Population.	e.g. demogenetics, demography, demology	Academic disciplines	Natural
demo-3	demo-3	Demography.	e.g. demographer, demolinguistic, demoeconomic	Academic disciplines	Societal
demono-	demono-	Demon, demons.		Social facts	Religion & mythology
dendr-	dendr-, dendro-	Trees.		Lifeforms	Plants
dento-	dent-, denti-, dento-	Tooth or teeth.	example(s) from: dentifrice, dentist, dentition, dental	Body parts	Teeth
deorsum-	deorsum-	In a downwards direction.		Abstract	Spatial			Down
deoxy-	deoxy-, desoxy-	(chemistry) Compounds that are formally derived from others by the replacement of a hydroxy group by a hydrogen atom.		Chemical substances	Derivatives
dermo-	derm-, derma-, dermat-, dermato-, dermo-	The skin.	example(s) from: dermatology, epidermis, hypodermic, xeroderma	Body parts	Integument
des-	des-	(chemistry) Removal of a group from a molecule.		Abstract	Composition			Un-joining
desmo-	desmo-	Bond, chain.		Abstract	Composition			Joining
deutero-	deuter-, deutero-	Second (in the sense of next after the first).	example(s) from: deuteragonist, deuterogamy	Abstract: Quantity	Numbers	Ordinal		2
dextro-	dex-, dextr-, dextro-	On the right.	example(s) from: dextrocardia	Abstract	Spatial			Right
di-1	di-1	Two.	e.g. diacetate, dialkene, diarchy, diactinal	Abstract: Quantity	Numbers	Cardinal		2
di-2	di-2	Double, twice the quantity.	e.g. diglossia, dicatalectic, dichoree	Abstract: Quantity	Numbers	Multiplier		2
di-3	di-3	A pair.	e.g. diblock, dimeson, dijet	Abstract	Composition			2
di-4	di-4	Both, possessing two distinct (possibly opposing) qualities.	e.g. dikinetic, dialetheism, dianalytic	Abstract	Composition
dia-	di-6, dia-	Through, across.	example(s) from: dialysis, diameter	Abstract	Spatial			Across
diamido-	diamido-	(chemistry) Diamine.		Chemical substances	Forms
dichloro-	dichlor-, dichloro-	(chemistry) Two chlorine atoms.		Chemical substances	Forms
dicho-	dicho-	In two parts, paired.		Abstract	Composition			Joining
dif-	dif-	Apart, separation.	example(s) from: different	Abstract	Similarity
digi-1	digi-1, digit-1	Digits: fingers, toes.	e.g. digitigrade, digitate	Body parts	Anatomical regions
digi-2	digi-2, digit-2	Digits: numbers.	e.g. digitize	Academic disciplines	Mathematical
digi-3	digi-3, digit-3	Digital technologies.	e.g. digicam	Technologies	Communication technologies
dihydro-	dihydro-	(chemistry) Two hydrogen atoms.		Chemical substances	Forms
dil-	dil-	(pharmacology) Used to form names of vasodilators.		Chemical substances	Pharmacological
dilitha-	dilitha-	Having two lithium atoms replace hydrogen atoms in an organic compound.		Chemical substances	Substituents
dilithio-	dilithio-	(chemistry) Having two lithium atoms replace hydrogen atoms in an organic compound.		Chemical substances	Substituents
dimethylimidazol-	dimethylimidazol-	(chemistry) Dimethylimidazole, within a larger chemical formula.		Chemical substances	Substituents
dinitro-	dinitro-	(chemistry) Two nitro groups (-NO2).		Chemical substances	Forms
dino-1	dino-1	(biology) Large, dangerous.		Abstract	Size			Big
dino-2	dino-2	Dinosaurs.		Lifeforms	Animals
dino-3	dino-3	(medicine) Whirling; rotation or dizziness.	e.g. dinic, scotodinia	Abstract	Motion
dino-4	dino-4	Dinoflagellates.		Lifeforms	Protists
diphy-	diphy-	Double, twofold.		Abstract: Quantity	Numbers	Multiplier		2
diplo-	dipl-, diplo-	Double.	example(s) from: diploid, diplosis	Abstract: Quantity	Numbers	Multiplier		2
dipso-	dipso-	Thirst.		Body processes	Sensory
dis-1	di-5, dis-1	Not, the reverse of. (Especially forming words with a negative connotation).	e.g. disagree, disconnect, dissatisfied, disinterested, dishonour	Abstract	Negation
dis-2	di-5, dis-2	Expressing separation or removal.	e.g. discard, disbar, disfranchise	Abstract	Composition			Un-joining
dis-3	di-5, dis-3	Used as an intensifier.	e.g. disembowel, disannul	Abstract	Normality			Intensifying
disco-	disco-, disko-	Disc-shaped.		Colours, shapes, and textures	Shapes			Round
disto-	disti-, disto-	Distal; remote, far from a reference/attachment point.		Abstract	Spatial			Far
docosa-	docosa-	Twenty-two.		Abstract: Quantity	Numbers	Cardinal		22
dodeca-	dodec-, dodeca-, duodeca-	Twelve.		Abstract: Quantity	Numbers	Cardinal		12
dolicho-	dolich-, dolicho-	Long.		Abstract	Size			Long
dolor-	dolor-, doloro-	Pain.		Body processes	Sensory
doppel-	doppel-	Indicating remarkable similarity to, or duplication of, the referenced person or object.		Abstract	Similarity			= Similar
dorso-	dors-, dorsi-, dorso-	The back of an organism.	example(s) from: dorsal, dorsocephalad	Abstract	Spatial			Back
down-	down-	Down, downwards.	example(s) from: download, downright, downbeat	Abstract	Spatial			Down
Dravido-	Dravido-	Dravidia.		Proper nouns	Historical countries
dromo-	dromo-	Movement.	example(s) from: dromotropic, syndrome	Abstract	Basis
ducto-	ducto-	(anatomy) Duct (any exocrine glandular duct); most often the mammary duct, bile duct, or tear duct.		Body parts	Tubes and ducts
duo-	du-, duo-	Two.	e.g. dual, duet	Abstract: Quantity	Numbers	Cardinal		2
duodeno-	duoden-, duodeno-	The duodenum.	example(s) from: duodenal atresia, duodenum	Body parts	Intestines
duplicato-	duplicato-	(biology) Doubly.		Abstract: Quantity	Numbers	Multiplier		2
duplo-	duplo-	(chemistry) Double, twofold.		Abstract: Quantity	Numbers	Multiplier		2
dura-	dura-	Hard.	example(s) from: dura mater	Colours, shapes, and textures	Textures			4 - Hard
dwi-	dwi-	(chemistry) A designation prefix for undiscovered chemical elements lying two periods under a known element in the periodic table.		Abstract: Quantity	Numbers	Ordinal		2
dys-01	dis-4, dys-01	difficult.	e.g. dyschezia, dysacusis, dysbasia, dyslexia, dyscopia	Abstract	Flexibility			Difficulty
dys-02	dis-4, dys-02	bad.	e.g. dysphoria, dystopia	Abstract: Correctness	Correctness	Goodness		! Bad
dys-03	dis-4, dys-03	unhealthy, harmful.	e.g. dysaemia, dyscognitive	Body processes	Pathological
dys-04	dis-4, dys-04	painful.	e.g. dysejaculation, dysuria	Body processes	Pathological
dys-05	dis-4, dys-05	incorrect.	e.g. dysbalanced, dyschloremia, dysdifferentiation	Abstract: Correctness	Correctness	Truth		! False
dys-06	dis-4, dys-06	poor, deficient.	e.g. dysgraphia, dysphasia, dysoxic	Abstract	Insufficiency
dys-07	dis-4, dys-07	abnormal.	e.g. dysgnathic, dysafferentation, dysesthesia	Abstract	Normality			Abnormal
dys-08	dis-4, dys-08	To fail.	e.g. dysautoregulation	Abstract	Completion
dys-09	dis-4, dys-09	inability, unable.	e.g. dyscontrol, dysmetria	Abstract	Flexibility
dys-10	dis-4, dys-10	(pathology) malady, disease.	e.g. dysendocrinism, dysexecutive, dysautonomia, dysbarism	Body processes	Pathological
dys-11	dis-4, dys-11	not.	e.g. dysfluent	Abstract	Negation

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Prefixes that start with E.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
e-1	e-1	Used to form adjectives with the sense of something being lacking or removed.	e.g. eluviation, edentulous, elenge	Abstract	Composition			Un-joining
e-2	e-2	In an electronic form, especially computerized and digital; often in association with the Internet.	e.g. email, ethlete, e-alert	Technologies	Communication technologies
e-3	e-3	A component in a mechanical system used for emergency purposes.	e.g. e-stop, e-brake	Technologies	Tools and machine components
e-4	e-4	Electric technology. (marketing) Used to prefix product names, to indicate an electrified or all-electric variant of the product, particularly cars.	e.g. e-bike, e-stim, e-cigarette	Technologies	Types of technologies
e-5	e-5	Used to prefix items that are embedded into devices, instead of being discrete or removable elements.	e.g. eMMC, eSIM	Technologies	Communication technologies
ec-	ec-	Out of, exclude.	example(s) from: ectopia, w:ectopic pregnancy	Abstract	Composition			Un-joining
ecclesio-	ecclesio-	Church.		Social facts	Social institutions
echino-	echino-	Spiny.		Colours, shapes, and textures	Shapes			Spiky
echo-	echo-	Sonic, sound.		Body processes	Sensory
eco-1	eco-1	Habitat or environment.	example(s) from: ecosystem	Academic disciplines	Natural
eco-2	eco-2	Ecology.		Academic disciplines	Natural
eco-3	eco-3	Environmentalism, ecological sustainability.		Social facts	Social and political movements
econo-	econo-	Economics; economy.		Academic disciplines	Societal
ecto-	ect-, ecto-	Outside, external.	example(s) from: ectoblast, ectoderm, ectoplasm	Abstract	Spatial			Outside
ed-1	ed-1	(non-productive) Again.	e.g. regrowth	Abstract	Temporal
edemato-	edem-, edemato-	Edema, swelling.		Body processes	Pathological
ego-1	ego-1	Self.		Abstract	Self
ego-2	ego-2	Goats.		Lifeforms	Animals
Egypto-	Egypto-, Ægypto-	Egypt.		Proper nouns	Extant countries
eigen-	eigen-	(mathematics) Remaining unchanged by linear transformations; eigenvector, eigenvalues, etc.		Abstract	Similarity			= Unchanged
eka-	eka-	One.		Abstract: Quantity	Numbers	Cardinal		1
Elamo-	Elamo-	Elam.		Proper nouns	Historical countries
elasto-	elasto-	Elastic.		Physical properties	Other physical properties
electro-1	electr-1, electro-1	Electricity, electric.	example(s) from: electro-analysis, electromagnetic	Physical properties	Other physical properties
electro-2	electr-2, electro-2	Electrons.	example(s) from: electro-analysis, electromagnetic	Particles	Particles
eleo-1	eleo-1	Oil.		Chemical substances	Biochemistry
eleo-2	eleo-2	(botany) Marsh, bog.		Landforms and ecosystems	Ecosystems
embolo-	embol-, embolo-	Embolism.		Body processes	Pathological
embryo-	embryo-	Embryos.		Life stages	Life cycle
emeto-	emeto-	Vomit; emesis.		Body processes	Pathological
Emilio-	Emilio-	Emilia.		Proper nouns	Historical countries
en-1	el-1, em-1, en-1	in, into.	e.g. embathe, enquire, enlist	Abstract	Spatial
en-2	el-2, em-2, en-2	on, onto.	e.g. embark, enplane, enthrone	Abstract	Spatial
en-3	el-3, em-3, en-3	covered by.	e.g. enclothe, embalm, enseam	Abstract	Covering
en-4	el-4, em-4, en-4	To become.	e.g. enslave, embetter, engloom	Abstract	Completion
en-5	el-5, em-5, en-5	Provide with.	e.g. empower	Abstract	Influences			Transferal
en-6	el-6, em-6, en-6	An intensifier.	e.g. entangle, enwisen	Abstract	Normality			Intensifying
enantio-	enantio-	Opposite.		Abstract	Similarity			! Different
encephalo-	encephal-, encephalo-	The brain.	example(s) from: encephalogram	Body parts	Brain
end-	end-, endo-, ent-, ento-	Inside, within. taking in.	example(s) from: endocrinology, endospore, endoskeleton	Abstract	Spatial			Inside
endothelio-	endothelio-	Combining form of endothelium.		Body parts	Membranes
ennea-	ennea-	Nine.		Abstract: Quantity	Numbers	Cardinal		9
enneadeca-	enneadeca-	Nineteen.		Abstract: Quantity	Numbers	Cardinal		19
enter-1	enter-1	(non-productive) In the process of, in between.	e.g. entermewer, enterclose	Abstract	Completion
entero-	enter-2, entero-	Intestines.	e.g. enterally, enterobacterial, enterogenesis	Body parts	Organs
entomo-	entomo-	Insects.		Lifeforms	Animals
enviro-1	enviro-1	Environment, environmental.		Academic disciplines	Natural
enviro-2	enviro-2	Environmetalism.		Social facts	Social and political movements
eo-	eo-	Earliest, ancient.		Abstract	Temporal			0 - First
eosin-	eosin-, eosino-	Red.	example(s) from: w:eosinophil granulocyte	Colours, shapes, and textures	Colours	Hues		1 - Red
epi-01	epi-01	Above in location or position.	e.g. epilittoral, epinasal, epinecral	Abstract	Spatial			Above
epi-02	epi-02	Upon, atop, directly on top of in terms of position.	e.g. epibenthos, epipetric, epispinal	Abstract	Spatial			Upon
epi-03	epi-03	(biology) Relating to epigenetics.	e.g. epichromosomal, epiclone, epigenome	Academic disciplines	Health sciences
epi-04	epi-04	Secondary: a consequence, by-product, additional, or lesser version.	e.g. epilanguage, epiphenomenon, epitoxoid	Abstract	Influences			Consequent
epi-05	epi-05	A part or segment that is located on the upper part of an object.	e.g. epikarst, epiphase, episternum	Abstract	Spatial			Upper
epi-06	epi-06	A part or locatation that is outer, particularly an outer layer.	e.g. epidermis, epipleuron, epitrochlea	Abstract	Spatial			Outer
epi-07	epi-07	(chemistry) Denotes an epimeric form.	e.g. epicedrol, epicholesterol, epitestosterone	Chemical substances	Forms
epi-08	epi-08	Located on the surface.	e.g. epifascial, epilimnion, epixylous	Abstract	Spatial			Surface
epi-09	epi-09	(zoology) Epibiotic: an organism that lives on another organism.	e.g. epiparasitism, episymbiont, episymbiotic	Life stages	Life cycle
epi-10	epi-10	Outward in direction or projection.	e.g. epignathous, epinasty, epipod	Abstract	Spatial			Outward
epi-11	epi-11	More, above a usual quantity, additional in quantity.	e.g. epicadmium, epidemic, epimenorrhagia	Abstract: Quantity	Quantity, relative	Inequality		> More
epi-12	epi-12	Beyond, meta, transcending.	e.g. epimuscular, epilanguage, epitheory	Abstract	Transcendence
epi-13	epi-13	(biology) Epidemiology.	e.g. epizootic, epornitic	Academic disciplines	Health sciences
epi-14	epi-14	Near in position.	e.g. epicellular, epistellar, epituberculosis	Abstract	Spatial			Near
epi-15	epi-15	Outranked, above in rank.	e.g. epifamily, epiphyletic, eparchy	Abstract	Ranking
epi-16	epi-16	Surrounding in position: the edges of the suffix.	e.g. epifascicular, epimacular, epiperimetric	Abstract	Spatial			Surrounding
epi-17	epi-17	Covering: the suffix is covered.	e.g. epiglottis, epispore, episcope	Abstract	Covering
epi-18	epi-18	After in time.	e.g. epiclassical, epigenesis, Epipaleolithic	Abstract	Temporal			After
epi-19	epi-19	Overlapping in position.	e.g. epilobous, epipharynx, epipole	Abstract	Spatial			Overlapping
epi-20	epi-20	Mapping onto, passing along, resolving to.	e.g. epimorphism, episememe	Abstract	Influences			Transferal
epi-21	epi-21	Top: a part that is positioned at the uppermost of multiple levels.	e.g. epipelagic, epiplankton, epivalve	Abstract	Spatial			Top
epi-22	epi-22	Front or anterior in position.	e.g. epicnemial, epiplastron, episternum	Abstract	Spatial			Front
epi-23	epi-23	Entirety, a system being referred to as a whole.	e.g. epichaperome, epiorganism, epicrisis	Abstract	Composition			Whole
epi-24	epi-24	Outside of in position.	e.g. epicycloid, epidural, episkeletal	Abstract	Spatial			Outside
epi-25	epi-25	Shallow in depth.	e.g. epithermal, epicortex, epigeous	Abstract	Size			Shallow
epi-26	epi-26	Similar, in the same form of, resembling.	e.g. epimorphic, epiascidiate, epicalyx	Abstract	Similarity			= Similar
epi-27	epi-27	Upwards in direction or growth.	e.g. epiphallus, epifilm, epigrowth	Abstract	Spatial			Upwards
epidermo-	epidermo-	Epidermal. epidermis; also, broadly, skin.		Body parts	Integument
epididymo-	epididymo-	Epididymis.		Body parts	Tubes and ducts
episio-	episi-, episio-	(medicine) Refers to the vulvar or perineal area in relation to the surgical procedures episiotomy, episiorrhaphy, or episioplasty.	example(s) from: episiotomy	Body parts	Anatomical regions
epithelio-	epithelio-	Epithelium, skin.		Body parts	Integument
epoxy-	epoxy-	(chemistry) Based on an epoxide.		Chemical substances	Functional groups
equ-	equ-	Equal; balanced; identical.		Abstract	Similarity			= Equal
equi-	aequi-, equi-, æqui-	Equal, equally.		Abstract	Similarity			= Equal
erem-1	erem-1	Desert.		Landforms and ecosystems	Ecosystems
erem-2	erem-2	(biology) Solitary.		Abstract	Composition
ergato-	ergat-, ergato-	Worker, labourer. Used in biology to note worker organisms.	e.g. ergatoid, ergatomorphic, ergatocracy	Life stages	Genders
ergo-	ergo-	Work.		Human activities	Other human activities
Eritreo-	Eritreo-	Eritrean, Eritrea.		Proper nouns	Extant countries
eroto-	eroto-	Sexual desire.	e.g. erotogenic, erotophobe, erotopathy	Body processes	Emotion
erythemato-	erythemato-	Erythema.		Body processes	Pathological
erythro-	erythr-, erythro-	Red.	example(s) from: erythrocyte	Colours, shapes, and textures	Colours	Hues		1 - Red
es-	es-	(pharmacology) Used to form names of drugs with a chiral center in the S configuration.		Chemical substances	Pharmacological
eso-	eso-	Within, inner.		Abstract	Spatial			Inside
esophago-	esophag-, esophago-, oesophag-, oesophago-	Esophagus.	e.g. esophagogastroduodenoscopy, esophagobronchial	Body parts	Organs
Esto-	Esto-	Estonia, Estonian.		Proper nouns	Extant countries
estr-2	estr-2	(pharmacology) Used to form names of estrogens.		Chemical substances	Pharmacological
estro-	estr-1, estro-	Estrus (oestrus).		Body processes	Reproduction
eteo-	eteo-	(linguistics) An ancient or ancestral language (or form of a language), dating from a time before it came into contact with another language; particularly one which had considerable influence, or which later displaced it entirely.	e.g. Eteocretan, Eteocypriot	Abstract	Temporal
eth-	eth-	(chemistry) Two carbon atoms.		Chemical substances	Forms
Ethio-	Ethio-	Ethiopian, Ethiopia.		Proper nouns	Extant countries
ethmo-	ethmo-	Ethmoid bone.	e.g. ethmocephaly, ethmoturbinate, ethmoidectomy	Body parts	Bones
ethno-	ethn-, ethno-	Race, people, cultural group.		Academic disciplines	Societal
etho-	etho-	Ethics. Essential character and behaviour patterns.		Academic disciplines	Societal
etio-	aetio-, eti-, etio-	Cause, causation.		Abstract	Basis
Etrusco-	Etrusco-	Etruria, Etruscans.		Proper nouns	Historical countries
eu-1	eu-1	Good, well.		Abstract: Correctness	Correctness	Goodness		= Good
eu-2	eu-2	Easily. true.		Abstract: Correctness	Correctness	Truth		= True
Euro-	Eur-, eur-, Euro-	Europe, especially as a political entity.	example(s) from: Eurocentric	Proper nouns	Regions
europ-	europ-	Europium.	e.g. europian, europoan	Chemical substances	Elements
eury-	eury-	A wide variety or range.	e.g. eurybathic, eurytherm, euryvalent	Abstract	Similarity			! Variety
even-1	even-1	Even in number, not odd.	e.g. even-toed, even-numbered, w:Even-even nucleus	Abstract: Quantity	Parity	Even		0
even-2	even-2	(no longer productive) Uniform, evenly in quantity.	e.g. even-down, even-tempered, even-toned	Abstract	Rates
even-3	even-3	(no longer productive) Prefix meaning equally, similarly, same.	e.g. evennight, evenmete, evenold	Abstract	Similarity			= Similar
even-4	even-4	(rare, dialectal or no longer productive) Prefix occurring mostly in older terms, bearing the meaning of equal in rank, joint, co-, fellow-.	e.g. even-bishop, even-christian, even-servant	Abstract	Ranking
ever-	ever-	Always.		Abstract	Temporal			Permanent
ex-1	ex-1	out of.	e.g. extract, expel, except, expression, exclusion	Abstract	Origin
ex-2	ex-2	outside.	e.g. ex-directory	Abstract	Spatial
ex-3	ex-3	former.	e.g. ex-husband, ex-president, ex-wife	Abstract	Temporal
ex-4	ex-4	(biology) Lacking, not possessing.	e.g. excaudate, exstipulate	Abstract	Possession
exa-	exa-	Quintillion. 1018.		Abstract: Quantity	Numbers	Factors		1018
exbi-	exbi-	260 = 1,0246.		Abstract: Quantity	Numbers	Factors		260
excito-	excito-	Excitation of a stimulus.	e.g. excitosecretory, excitoreflex, excitorepellent	Body processes	Bodily needs and functions
exo-	exo-	Outside, external, outer. turning out.	example(s) from: exophthalmos, exoskeleton, exoplanet	Abstract	Spatial			Outside
extero-	extero-	From outisde.		Abstract	Spatial			Outside
extra-	extra-	Outside, beyond. Outward.	example(s) from: extracurricular	Abstract	Spatial			Outside
extro-	extro-	Outwards.		Abstract	Spatial			Outward

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Prefixes that start with F.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
facio-	faci-, facio-	The face.	example(s) from: facioplegic, facial	Body parts	Anatomical regions
fascio-	fascio-	(anatomy) Fascia.	e.g. fasciocutaneous, fasciotomy	Body parts	Connective tissues
febri-	febri-	Fever.		Body processes	Pathological
fem-	fem-	Femininity, women.		Life stages	Genders
femoro-	femoro-	The femur.		Body parts	Bones
femto-	femto-	10-15.		Abstract: Quantity	Numbers	Factors		10-15
ferro-	ferr-, ferri-, ferro-, ferroso-	Iron (element). (chemistry) ferrous.		Chemical substances	Elements
feto-	feto-, foeto-	Fetus.		Life stages	Life cycle
fibrino-	fibrino-	Fibrin.		Chemical substances	Biochemistry
fibro-	fibr-, fibro-	Fibre.	example(s) from: fibril, fibrin, w:fibrinous pericarditis, fibroblast, fibrosis	Chemical substances	Biochemistry
fibromato-	fibromato-	(medicine) Fibroma.		Body processes	Pathological
fil-	fil-	(anatomy) Fine, hair-like.	example(s) from: filament, filum terminale	Colours, shapes, and textures	Shapes			Filiform
Fil-	Fil-	The Fillipines, Fillipino.		Proper nouns	Extant countries
filtro-	filtro-	To filter, strain.		Abstract	Composition			Un-joining
Finno-	Fenno-, Finno-	Finland, Finnish.		Proper nouns	Extant countries
fistulo-	fistulo-	Connection, passage, hollow.		Abstract	Landmarks
Fitz-	Fitz-	(used in English surnames) Son of; especially used for the illegitimate sons of royalty.		Proper nouns	Personal names
fix-1	fix-1	To repair, fix.		Abstract	Completion
fix-2	fix-2	To attach.		Abstract	Composition			Joining
flato-	flato-	Flatulence.		Body processes	Bodily needs and functions
flavo-	flavo-	Yellow.		Colours, shapes, and textures	Colours	Hues		3 - Yellow
flexi-	flex-, flexi-	Flexible.		Abstract	Flexibility
flexo-	flexo-	To bend, flexion, flexure.		Abstract	Motion
flori-	flori-	Flowers.		Lifeforms	Plants
fluoro-	fluo-, fluor-, fluori-, fluoro-	Fluorine. Fluorescence.		Chemical substances	Elements
fluvio-	fluvio-	River.		Landforms and ecosystems	Landforms
folliculo-	folliculo-	Follicule.		Body parts	Cavities
for-01	for-01	(non-productive) Forth: prefixed to verbs to indicate a direction of 'away', 'off', 'forth'.	e.g. forsteal, forloppin, forban, fordrive, fortake, forthrow, forshake, forhow	Abstract	Spatial
for-02	for-02, fore-19	(non-productive) Exhausting: prefixed to verbs with the sense of wearing or exhausting one's self.	e.g. forsing, forwander, fortravel	Abstract	Completion
for-03	for-03, fore-19	(non-productive) Destructively: prefixed to verbs with the sense of destruction or pain.	e.g. forhang, forthink, fordo	Abstract	Completion
for-04	for-04, fore-19	(non-productive) Wrongly: prefixed to verbs with the sense of wrongly, amorally.	e.g. forteach, forswear, forworship, forlead, forlive	Abstract: Correctness	Correctness	Goodness		! Bad
for-05	for-05, fore-19	(non-productive) Neglectfully: prefixed to verbs with the sense of abstaining from or neglecting.	e.g. forslip, forslack	Abstract	Insufficiency
for-06	for-06	(non-productive) Very: intensifying adjectives.	e.g. forblack, forswollen	Abstract	Normality
for-07	for-07	(non-productive) Making: prefixed to verbs to indicate the subject takes the character of the verb.	e.g. fordote, forguilt	Abstract	Influences
for-08	for-08	(non-productive) Excessively: prefixed to verbs with the sense of doing so in excessive or overwhelm.	e.g. forwax, forgrow, forhare	Abstract	Normality
for-09	for-09, fore-19	(non-productive) Excluding: prefixed to verbs to give the sense of prohibition or exclusion.	e.g. forjudge, forshut, forbar	Abstract	Composition
for-10	for-10	(non-productive) Intensively.	e.g. forbeat, fordread, forlay	Abstract	Normality
for-11	for-11	(non-productive) Thoroughly: prefixed to verbs with the sense of thoroughly, all over.	e.g. forgrow, forbathe, forseek, forwrap	Abstract	Spatial
for-12	for-12, fore-20	(rare) Outside, out, exterior.	e.g. foreclose, forcatch, forfeit	Abstract	Spatial
fore-01	fore-01	Before: the suffix is happening earlier in time.	e.g. forebusy, forehear, forechosen	Abstract	Temporal
fore-02	fore-02	The early stage of the suffixed time period.	e.g. foredawn, foreday, foreyear	Abstract	Temporal
fore-03	fore-03	Directly or immediately preceding in time.	e.g. forebirth, foreking, forehammer	Abstract	Temporal
fore-04	for-13, fore-04	Positioned at or near the front.	e.g. forebooth, foregear, forehew	Abstract	Spatial
fore-05	fore-05	(nautical) The fore of a ship.	e.g. forecabin, forebridge, foreboom	Abstract	Spatial
fore-06	fore-06	Anterior: the frontal part of a body.	e.g. forebrain, forehoof, foregear	Abstract	Spatial
fore-07	fore-07	Outer: the leading, outward portion of a wave or effort; or a distal part of a body.	e.g. forebeam, forefront, forebreast, forearm	Abstract	Spatial
fore-08	fore-08	Forepart: the front part of an object or area.	e.g. forebody, forecourt, forehand	Abstract	Spatial
fore-09	fore-09	Near, close to, adjacent in position.	e.g. foredune, foreland, forby	Abstract	Spatial
fore-10	fore-10	Nearest: the part of the suffix which is nearest/closest.	e.g. forebeach, forefield, forend	Abstract	Spatial
fore-11	fore-11	Forward in temporal direction, anticipating.	e.g. foredawn, foreglimpse, forecast	Abstract	Temporal
fore-12	for-13, fore-12	Forward in spatial direction.	e.g. forehearth, forebite, foregaze	Abstract	Spatial
fore-13	for-13, fore-13	Outward in spatial direction.	e.g. forecry, forehand, foreleader	Abstract	Spatial
fore-14	fore-14	Previous or earlier in order or sequence.	e.g. foredescribed, forebook, forebelief	Abstract	Ranking
fore-15	fore-15	First in order or sequence.	e.g. forebell, forefinger, foredeal	Abstract	Ranking
fore-16	fore-16	Greater in rank, superior.	e.g. forehand, forechoice, forby	Abstract	Ranking
fore-17	fore-17	Prominent, most important, foremost or greatest in rank.	e.g. forecolour, forehand, foreground	Abstract	Ranking
fore-18	for-13, fore-18	Ancestor, ancestral.	e.g. forebear, forefather, fore-elder	Abstract	Parenthood
formo-	form-, formo-	Formic acid.		Chemical substances	Acids
forth-	forth-	Forth, forward, away.		Abstract	Spatial			Forward
forti-	forti-	Strong.		Abstract	Potency
fos-	fos-	Phosphorous.		Chemical substances	Elements
fovea-	fovea-	Small pit or depression in an organ; Fovea centralis.		Body parts	Cavities
frac-	frac-	To break, cleave.		Abstract	Composition			Un-joining
Franco-	Franco-, franco-	French.	e.g. Francophone	Proper nouns	Extant countries
franken-	Franken-, franken-	Indicating artificiality or a combination of disparate elements, often terrifying or unattractive; often denoting a GMO ("genetically modified organism") product.		Abstract: Correctness	Correctness	Genuine		! Artificial
frig-	frig-	Cold.	e.g. frigorism, frigostabile, frigolabile	Physical properties	Climactic conditions
fronto-	front-, fronto-	The frontal part of an object.	example(s) from: frontonasal	Abstract	Spatial			Front
fructi-	fructi-, fructo-	Fruit.		Lifeforms	Plants
fructo-	fructo-	Fructose.		Chemical substances	Biochemistry
full-	ful-, full-	Fully, completely, in full.		Abstract	Composition			Whole
fungi-	fungi-	Fungi.		Lifeforms	Fungi

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Prefixes that start with G.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
gab-	gab-	(pharmacology) Gabamimetic agent.		Chemical substances	Pharmacological
Gaelo-	Gaelo-	Gaelic.	e.g. Gaelophone	Proper nouns	Languages
gain-	gain-	Against, contrary to.	example(s) from: gainsay	Abstract	Polarity			Opposition
galacto-	galact-, galacto-	Milk.	example(s) from: galactorrhea, galaxy	Body parts	Bodily fluids
Galaico-	Galaico-	Galicia.		Proper nouns	Historical countries
gall-	gall-	Gallium.	e.g. gallane, gallylene	Chemical substances	Elements
Gallo-	Gallo-	French.	e.g. Gallophone	Proper nouns	Extant countries
galvano-	galvano-	Electricity, electric.		Physical properties	Other physical properties
gameto-	gameto-	Gametes (eggs and sperm).		Body parts	Gametes
gamo-1	gamo-1	Marriage.	e.g. gamomania, gamophobia	Social facts	Social institutions
gamo-2	gamo-2	Gametes.	e.g. gamodeme, gamogenesis, gamophyte	Body parts	Gametes
gamo-3	gamo-3	(biology) United, fused, merged.	e.g. gamopetalous, gamosepalous, gamophyllous	Abstract	Composition			Joining
ganglio-	ganglio-	Ganglion.		Body parts	Nerves
gastro-1	gastr-1, gastro-1	Stomach, gastric.	example(s) from: gastroenterology, gastropod	Body parts	Organs
gastro-2	gastr-2, gastro-2	Cooking.	e.g. gastronomy, gastroporn	Human activities	Other human activities
gelatino-	gelatino-	Gelatine.		Chemical substances	Biochemistry
genio-	genio-	Chin.		Body parts	Anatomical regions
genito-	genito-	Genitals.		Body parts	Organs
geno-1	gen-1, geno-1	Genetics.	e.g. genome	Academic disciplines	Health sciences
geno-2	gen-2, geno-2	Family, tribe, race, offspring.	e.g. genocide, genophilia, genophobe	Social facts	Social institutions
genu-	genu-	(anatomy) The knee.	example(s) from: w:genu valgum	Body parts	Anatomical regions
geo-1	geo-1	Earth.	example(s) from: geography, geology, geometry	Celestial bodies and their rotations	Solar system
geo-2	geo-2	Geography.	e.g. geopolitical, geolocation	Academic disciplines	Natural
Georgio-	Georgio-	Georgian, Georgia.		Proper nouns	Extant countries
germ-	germ-	Basic part.		Abstract	Composition			Part
german-	german-	Germanium.	e.g. germanol, germylene	Chemical substances	Elements
Germano-	Germano-, germano-	Germany.	e.g. Germanophone	Proper nouns	Extant countries
geronto-	gero-, geronto-	Senescence, the elderly.		Life stages	Life cycle
gest-	gest-	(pharmacology) Steroid, progestrogen.		Chemical substances	Pharmacological
gesto-	gestero-, gesto-	Pregnancy.		Body processes	Reproduction
gibi-	gibi-	230.		Abstract: Quantity	Numbers	Factors		230
giga-	giga-	Billion, 109. (computing) 230.		Abstract: Quantity	Numbers	Factors		109
giganto-	giganto-	Gigantic, enormous.		Abstract	Size			Big
gingivo-	gingiv-, gingivo-	The gums.	example(s) from: gingivitis	Body parts	Teeth
glacio-	glaci-, glacio-	Glaciers.		Landforms and ecosystems	Landforms
glauco-	glauc-, glauco-	Grey, silver.	example(s) from: glaucoma	Colours, shapes, and textures	Colours	Shades		2 - Grey
glio-	gli-, glio-	Glia.		Body parts	Nerves
glomerulo-	glomerulo-	(anatomy) Glomerulus.		Body parts	Tubes and ducts
glosso-1	gloss-1, glosso-2, glott-2, glotto-2	The tongue.	e.g. glossopharyngeal, glossodynia	Body parts	Organs
glosso-2	gloss-2, glosso-1, glott-1, glotto-1	Speech.	e.g. glossolalia, glossophilia	Human activities	Language
gluco-	gluco-	Sweet.	example(s) from: glucocorticoid, glucose	Physical properties	Tasteable properties
glucurono-	glucurono-	(chemistry) Relating to glucuronic acid.		Chemical substances	Acids
gluta-	gluta-, glutar-	Glutamic acid.		Chemical substances	Acids
gluteo-	gluteo-	The gluteus, buttocks.		Body parts	Muscles
gly-	gly-	(pharmacology) Antihyperglycemic.		Chemical substances	Pharmacological
glycero-	glycero-	Glycerol.		Chemical substances	Biochemistry
glyco-	glyc-, glyco-	Sugar.	example(s) from: glycolysis	Chemical substances	Biochemistry
gnatho-	gnath-, gnatho-	The jaw.	example(s) from: gnathodynamometer	Body parts	Anatomical regions
gnos-	gnos-	To know, particularly in a religious sense.	e.g. gnostic	Human activities	Other human activities
god-	god-	Godfamily relations.		Abstract	Parenthood
gon-1	gon-1, gono-1	Sexual reproduction.	e.g. gonochoric	Body processes	Reproduction
gon-2	gon-2, gono-2	Seed, semen.	e.g. gonocyst, gonarcus	Body parts	Gametes
gon-3	gon-3, gono-3	Knee.	e.g. gonarthritis	Body parts	Anatomical regions
gonado-	gonado-	The gonads.		Body parts	Organs
gonio-	gonio-	Angle.		Abstract	Angles
Gotho-	Gotho-	Goths.		Proper nouns	Historical countries
grammatico-	grammatico-	Grammar.		Academic disciplines	Linguistics
grand-	grand-	Family relation that is one generation removed from original noun (e.g. grandfather).		Abstract	Parenthood
granulomato-	granulomato-	(medicine) Granuloma.		Body processes	Pathological
grapho-	grapho-	Writing, drawing.		Human activities	Language
gravi-	gravi-	Weight.		Abstract	Mass
gravid-	gravid-, gravido-	Pregnancy.		Body processes	Reproduction
gravito-	gravito-, gravo-	Acted upon by gravity.	e.g. gravitomagnetic, gravitoturbulent, gravitoinertial	Physical properties	Other physical properties
great-	great-	Family relation that is one generation removed from original noun (e.g. great-uncle).		Abstract	Parenthood
Greco-	Graeco-, Greco-, Græco-	Greek.	e.g. Grecophone	Proper nouns	Extant countries
guan-	guan-	(pharmacology) Guanidine.		Chemical substances	Pharmacological
Guiano-	Guiano-	Guiana, Guianan.		Proper nouns	Extant countries
Guineo-	Guineo-	Guinean, Guinea.		Proper nouns	Extant countries
gymno-	gymno-	Naked.		Abstract	Covering
gyne-	gyn-, gynaeco-, gyne-, gyneco-, gyno-, gynæc-, gynæco-	Women. Female reproductive system. Gynecology.	example(s) from: gynaecology, gynecomastia, gynoecium	Life stages	Genders
gyro-	gyro-	Circle, circular, spinning, rotating.	example(s) from: gyrocopter, gyroscope, gyrosphere	Colours, shapes, and textures	Shapes			Round

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Prefixes that start with H.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
hadeo-	hadeo-	(astronomy) Pluto.		Celestial bodies and their rotations	Solar system
hadro-	hadro-	(physics) Hadron, hadronic.		Particles	Particles
haemangio-	haemangio-, hemangi-, hemangio-	Blood vessels.	example(s) from: hemangioma	Body parts	Tubes and ducts
haemo-	haem-, haema-, haemat-, haemato-, haemo-, hem-, hema-, hemat-, hemato-, hemo-, hæm-, hæmat-, hæmato-, hæmo-	Blood.	example(s) from: hematology, older form haematology	Body parts	Bodily fluids
hafn-	hafn-	Hafnium.	e.g. hafnian, hafnocene dichloride	Chemical substances	Elements
hagio-1	hagi-1, hagio-1	Pertaining to saints.	e.g. hagiolatry, hagiology, hagiomania	Social facts	Religion & mythology
hagio-2	hagi-2, hagio-2	holiness, holy people or objects.	e.g. hagiarchy, hagiotherapy, hagioscope	Social facts	Religion & mythology
half-	half-	Half.		Abstract: Quantity	Numbers	Cardinal		0.5
halluc-	halluc-	To wander in the mind.	example(s) from: hallucinosis, hallucination	Body processes	Pathological
halo-1	halo-1	The sea, sea water.		Landforms and ecosystems	Oceanic
halo-2	halo-2	(chemistry) Halogens.		Chemical substances	Elements
haplo-1	aplo-1, haplo-1	(genetics) Haploid: having a single set of unpaired chromosomes.	e.g. haplodepletion, haplodiploid, haplosis	Life stages	Life cycle
haplo-2	aplo-2, haplo-2	Un-duplicating: where there was two identical copies, deleting the redundant copy. Analogy to haploid in genetics.	e.g. haplography, haplology, haplosegment	Abstract: Quantity	Numbers	Multiplier		0.5
haplo-3	aplo-3, haplo-3	Simple.	e.g. haploceratid, haplodont, haplostele	Abstract	Complexity
haplo-4	aplo-4, haplo-4	Single.	e.g. haploscope, haploid, haplometrosis	Abstract	Composition
haplo-5	aplo-5, haplo-5	(soil science) Haplic: soil that is typical of its kind.	e.g. haploperox, haploxeralf, haploxeroll	Abstract	Normality			Normal
hapto-1	hapto-1	Binding.		Abstract	Composition			Joining
hapto-2	hapto-2	Touch, touching.		Abstract	Influences			Touch
he-	he-	Male animal.		Life stages	Genders
hebe-	hebe-	Youth.	e.g. hebephile	Life stages	Life cycle
Hebra-	Hebra-	Hebrew.		Proper nouns	Languages
hecto-	hecato-, hect-, hecto-	Hundred. 100.		Abstract: Quantity	Numbers	Cardinal		100
hectokilo-	hectokilo-	(obsolete) In the metric systems of units, multiplying the unit to which it is attached by 100,000. Symbol. hk.		Abstract: Quantity	Numbers	Factors		105
heli-1	heli-1	Helicopter.		Technologies	Transportation
heli-2	heli-2	Helium.	e.g. disodium helide	Chemical substances	Elements
helico-	helico-	Helix, spiral.		Colours, shapes, and textures	Shapes			Curly
helio-	heli-, helio-	Sun.		Celestial bodies and their rotations	Solar system
hella-	hella-	(informal) A very large quantity.		Abstract: Quantity	Quantity	Amount		> Much
Helleno-	Hellen-, Helleno-	Greek, pertaining to Greece (Hellas).	e.g. Hellenophone	Proper nouns	Extant countries
Helveto-	Helveto-	Swiss, Switzerland.		Proper nouns	Extant countries
hemero-	hemero-	Day.		Celestial bodies and their rotations	Time periods
hemi-	hemi-	Half.	example(s) from: hemimorphic, hemisphere	Abstract: Quantity	Numbers	Cardinal		0.5
hendeca-	hendeca-	Eleven.		Abstract: Quantity	Numbers	Cardinal		11
heort-	heort-	(religious) Feast.		Human activities	Other human activities
hepato-	hepat-, hepatic, hepatico-, hepato-	The liver.	example(s) from: hepatology, hepatitis	Body parts	Organs
hepta-	epta-, hept-, hepta-, heptakis-	Seven. seven atoms, seven groups.		Abstract: Quantity	Numbers	Cardinal		7
heptadeca-	heptadeca-	17.		Abstract: Quantity	Numbers	Cardinal		17
hermeo-	hermeo-, hermo-	(astronomy) Mercury.		Celestial bodies and their rotations	Solar system
hernio-	hernio-	Hernia.		Body processes	Pathological
herpet-1	herpet-1, herpeto-1	Reptile.		Lifeforms	Animals
herpet-2	herpet-2, herpeto-2	Herpes.		Body processes	Pathological
Herzego-	Hercego-, Herzego-	Herzegovina, Herzegovinan.		Proper nouns	Extant countries
hetero-01	heter-01, hetero-01	Varied, heterogeneous; a set that has variety with respect to the suffix.	e.g. heterogamous, heterochromatic, heterogender, heteroglossia	Abstract	Similarity			! Variety
hetero-02	heter-02, hetero-02	(organic chemistry) Heterocyclic: a cyclic compound with multiple elements in its ring. The non-carbon atoms are known as heteroatoms.	e.g. heteroalkene, heteroaddition, heterofullerene, heteroaromatic	Abstract	Composition
hetero-03	heter-03, hetero-03	(chemistry) A heterogeneous mixture.	e.g. heterofunctionalization, heterofibril, heterodimeric	Abstract	Complexity
hetero-04	heter-04, hetero-04	Across, spanning multiple distinct kinds of the suffix, different.	e.g. heterochrome, heterocladic, heteroexchange, heterocoordination	Abstract	Linking
hetero-05	heter-05, hetero-05	(LGBTQ) Straight, heterosexual.	e.g. heterocentric, heteroamorous, heterofemale	Social facts	Social and political movements
hetero-06	heter-06, hetero-06	Other, by another, not auto-.	e.g. heteroadministered, heterobiography, heterocentric, heteroencapsidation	Abstract	Self
hetero-07	heter-07, hetero-07	Opposite in direction or position.	e.g. heterodromous, heterofacial, heterodirectional, heterochiral	Abstract	Spatial
hetero-08	heter-08, hetero-08	(transplantation) Outside, xeno-.	e.g. heterogenetic, heterocephaly, heterodiegetic	Abstract	Influences
hetero-09	heter-09, hetero-09	Asymmetric in shape.	e.g. heterogangliate, heteracanth, heterocercal	Abstract	Similarity	Symmetry		! Asymmetric
hetero-10	heter-10, hetero-10	Inconsistent, irregular, or intermittent.	e.g. heterochylia, heterodynamic, heterochronic	Abstract	Normality
hetero-11	heter-11, hetero-11	Alternating.	e.g. heterogamous, heteroclitic	Abstract	Temporal
Hetto-	Hetto-	Hattians.		Proper nouns	Historical countries
hexa-	hex-, hexa-, hexakis-	Six. six atoms, six groups.		Abstract: Quantity	Numbers	Cardinal		6
hexadeca-	hexadeca-	16.		Abstract: Quantity	Numbers	Cardinal		16
hexahedro-	hexahedro-	(chemistry) Eight atoms bound into a hexahedron (cube).		Colours, shapes, and textures	Shapes			Boxy
Hiberno-	Hiberno-	Ireland.		Proper nouns	Extant countries
hiero-1	hiero-1	Holy, sacred.		Social facts	Religion & mythology
hiero-2	hiero-2	(Eastern Orthodoxy) Denoting a man of a title such as a monk who is also a clergyman.	e.g. hieromonk, hierodeacon, hieromartyr	Social facts	Religion & mythology
Himalo-	Himalo-	The Himalayas.		Proper nouns	Regions
hinder-	hind-, hinder-	Positioned toward the rear, back.	example(s) from: hindsight, hindquarters	Abstract	Spatial			Back
Hindi-	Hindi-	Hindi.	e.g. Hindiphone	Proper nouns	Languages
hippo-	hipp-, hippo-	Horses.		Lifeforms	Animals
Hispano-	Hispano-, hispano-	Spanish.	e.g. Hispanophone	Proper nouns	Extant countries
histo-	hist-, histi-, histio-, histo-	(biology) Tissue.	example(s) from: histology	Body parts	Cellular
historico-	historico-, historio-, historios-	History, historiography.		Academic disciplines	Societal
Hitto-	Hittito-, Hitto-	Hittites.		Proper nouns	Historical countries
holo-	hol-, holo-	Whole, complete, total.		Abstract	Composition			Whole
homeo-	home-, homeo-, homoe-, homoeo-, homoi-, homoio-, homœ-, homœo-	Similar.	e.g. homeostasis, homeomorphy, heomeomorphy	Abstract	Similarity			= Uniformity
homo-1	homo-1	Same, similar, alike, identical.	example(s) from: homogeneous, homogenize, homologous, homophone, homozygous	Abstract	Similarity			= Uniformity
homo-2	homo-2	The gay community.	e.g. homonationalism, homonormativity	Social facts	Social and political movements
hopl-1	hopl-1, hoplo-1	Weapon, arms, armed.		Technologies	Warfare
hopl-2	hopl-2, hoplo-2	Hoof, hooves, hooved.		Body parts	Integument
hormono-	hormono-	Hormones.		Chemical substances	Biochemistry
horo-	horo-	Time.		Abstract	Basis
humero-	humer-, humero-	(anatomy) Humerus.	e.g. humerodorsal, humerocubital	Body parts	Bones
Hungaro-	Hungaro-	Hungary, Hungarian.		Proper nouns	Extant countries
Hurro-	Hurro-	Pertaining to Hurrian or the Hurrians.		Proper nouns	Historical countries
hyalo-	hyalo-	Transparent.		Colours, shapes, and textures	Colours	Shades		0 - Transparent
hydro-1	hydr-1, hydro-1	Water.	e.g. hydrate, hydroelectricity	Chemical substances	Compounds
hydro-2	hydr-2, hydro-2	(chemistry) Hydrogen.	e.g. hydrocarbon, hydrazide	Chemical substances	Elements
hydro-3	hydr-3, hydro-3	(zoology) Hydrozoa.	e.g. Hydrozoa	Lifeforms	Animals
hydro-4	hydr-4, hydro-4	Liquid.	e.g. hydrodynamics	Physical properties	States of matter
hydroxy-	hydroxy-	(chemistry) Hydroxyl.		Chemical substances	Derivatives
hyeto-	hyeto-	Rain, rainfall.		Weather and natural disasters	Weather
hygro-	hygr-, hygro-	Humidity.		Physical properties	Climactic conditions
hylo-	hyl-, hylo-	Forests, wood.		Landforms and ecosystems	Ecosystems
hyo-	hyo-	(anatomy) Hyoid bone.		Body parts	Bones
hyper-1	hyper-1	Over, above.	example(s) from: hyperthermia	Abstract	Spatial			Above
hyper-2	hyper-2	Beyond.	e.g. hypersonic	Abstract	Transcendence
hyper-3	hyper-3	Excessive.	e.g. hyperactive	Abstract: Quantity	Quantity	Amount		>> Too much
hyper-4	hyper-4	Augmentative: intensely, extremely, or exceptional.	example(s) from: hyperthermia	Abstract	Normality			Augmentative
hyper-5	hyper-5	(mathematics) Existing in more than three spatial dimensions.	e.g. hyperspace	Abstract	Basis
hyper-6	hyper-6	(computing) Linked non-sequentially.	e.g. hypertext	Abstract	Routing
hypho-	hypho-	(chemistry) A relatively open boron structure.		Abstract	Chemical structures
hypno-	hypn-, hypno-	Sleep. hypnosis.		Body processes	Bodily needs and functions
hypo-1	hyp-1, hypo-1	(anatomy) Below, beneath, under.	e.g. hypodermic, hypothalamus	Abstract	Spatial			Beneath
hypo-2	hyp-2, hypo-2	(medicine) Deficient; less than normal.	e.g. hypogonadism, hypothermia, hypoventilation	Abstract	Insufficiency			Deficient
hypo-3	hyp-3, hypo-3	(chemistry) Designating oxoacid and oxyanions with a low amount of oxygen. Antonym: per-.	e.g. hyposulphate	Abstract: Quantity	Quantity	Amount		< Not much
hypo-4	hyp-4, hypo-4	(music) Having a range which extends from a perfect fourth below the tonic to a perfect fifth above.	examples from : hypolydian, hypodorian, hypomixolydian	Abstract	Spatial
hypothalamo-	hypothalamo-	(anatomy) Hypothalamus.		Body parts	Brain
hypso-1	hyps-1, hypsi-1, hypso-1	Tall, high in size.	e.g. hypsarrhythmia, hypsodont, hypsicephalic	Abstract	Size			Tall
hypso-2	hyps-2, hypsi-2, hypso-2	High in location or position.	e.g. hypsophobia, hypsophyll, hypsophonous	Abstract	Spatial			High
hypso-3	hyps-3, hypsi-3, hypso-3	Upwards in movement or direction.	e.g. hypsochromic, w:Hypsibema	Abstract	Spatial			Upwards
hypso-4	hyps-4, hypsi-4, hypso-4	Altitude or elevation; aloft, from on high.	e.g. hypsography, hypsometer, hypsometry	Abstract	Spatial			Altitude
hystero-	hyster-, hystero-	The uterus.	example(s) from: hysterectomy, hysteria	Body parts	Organs

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Prefixes that start with I.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
i-3	i-3	(Jamaica) Used to transform English words into words used by Rastafarians with a special meaning.	e.g. Itesquake, Inity, Itinually	Social facts	Religion & mythology
i-4	i-4	Alluding to the internet.	e.g. BBC's iPlayer, iCarly	Technologies	Communication technologies
i-5	i-5	Alluding to digital devices and computer programs, especially those that are cutting-edge or fashionable, and those from Apple.	e.g. iPad, iPhone, iMac	Technologies	Communication technologies
iatro-	iatr-, iatro-	Pertaining to medical treatment.	example(s) from: iatrochemistry, iatrogenesis	Social facts	Social institutions
Ibero-	Ibero-	Iberian (Spain and Portugual).		Proper nouns	Regions
ichno-	ichn-, ichno-	Trace or trace amounts of something.		Abstract: Quantity	Quantity	Amount		< Not much
ichthyo-1	ichthy-1, ichthyo-1	Fish.		Lifeforms	Animals
ichthyo-2	ichthy-2, ichthyo-2	(medicine) Scaly, dry skin.		Body processes	Pathological
icono-	icono-	Image, icon.		Technologies	Communication technologies
icosa-	eicosa-, icosa-, icosi-	20.		Abstract: Quantity	Numbers	Cardinal		20
ictero-	ictero-	Jaundice.		Body processes	Pathological
ideo-	ideo-	Idea, concept.	example(s) from: ideograph, ideology	Academic disciplines	Linguistics
idio-	idio-	Personal, own.	example(s) from: idiolect, idiopathic	Abstract	Self
igneo-1	igneo-1	(geology) Igneous.	e.g. ignimbrite, ignimbritic, tectono-igneous cycle	Chemical substances	Materials
igneo-2	igneo-2	The colour of fire, red.	e.g. w:Igneoplaca, w:Madascincus igneocaudatus, w:Igneocumulus	Colours, shapes, and textures	Colours	Hues		1 - Red
ile-	ile-, ileo-, ilio-	The ileum.	example(s) from: w:ileocecal valve	Body parts	Intestines
ill-	ill-	Bad, wrong.		Abstract: Correctness	Correctness	Goodness		! Bad
Illyro-	Illyro-	Pertaining to Illyria or Illyrian.		Proper nouns	Historical countries
imido-	imid-, imido-	(chemistry) Imide.		Chemical substances	Functional groups
immuno-	immuno-	Immune system.		Body parts	Organ systems
in-1	i-1, il-1, in-1	Inward.	e.g. inbeat, inbend, incave	Abstract	Spatial			Inward
in-2	i-2, il-2, in-2	Within.	e.g. inbreed, inburning, incircle	Abstract	Composition			Among
in-3	il-3, in-3	Into.	e.g. imband, imbar, imbarn	Abstract	Spatial
in-4	il-4, im-4, in-4, ir4	Doing, forming verbs.	e.g. inblind, incloister	Abstract	Completion
in-5	il-5, im-5, in-5, ir5	Having, possessing.	e.g. imbannered, inaureole, incarnate	Abstract	Possession
in-6	ig-6, il-6, im-6, in-6, ir6	(non-productive) Added to adjectives to mean not.	e.g. inedible	Abstract	Negation
in-7	ig-7, il-7, im-7, in-7, ir7	Added to nouns to mean lacking or without.	e.g. inaccurate	Abstract	Possession
in-8	ig-8, il-8, im-8, in-8, ir8	Cannot.	e.g. incredulity	Abstract	Potency
incudo-	incudo-	(anatomy) Incus bone.		Body parts	Bones
indi-	indi-	Indium.	e.g. indic, indite	Chemical substances	Elements
Indo-	Indo-	India. East Indies. Indo-European.	example(s) from: Indo-European	Proper nouns	Extant countries
Indonesio-	Indonesio-	Indonesia, Indonesian.		Proper nouns	Extant countries
infero-	infero-	Inferior, further below/lower on the body.		Abstract	Spatial
info-	info-	Information.		Academic disciplines	Mathematical
infra-	infra-	Below, underneath, beneath.	example(s) from: infrared	Abstract	Spatial			Beneath
infundibulo-	infundibulo-	(anatomy) Infundibulum. Funnel-shaped cavity or organ.		Colours, shapes, and textures	Shapes			Conical
inguino-	inguino-	The groin.		Body parts	Anatomical regions
insta-	insta-	(informal) Instant, fast, speedy.		Abstract	Rates			Fast
integro-	integro-	(mathematics) Integration.		Abstract	Rates
inter-01	inter-01	A position which is in between two (or more) of the kind indicated by the suffix.	e.g. interblog, intercausal, interexperiential	Abstract	Routing
inter-02	inter-02	A spatial position which is in between two (or more) of the kind of landmark indicated by the suffix.	e.g. interangular, interbarb, interbronchial	Abstract	Spatial
inter-03	inter-03	A social position which is in between two (or more) of the kind of social group indicated by the suffix.	e.g. interarmy, interobserver, interparental	Abstract	Composition
inter-04	inter-04	A temporal position which is in between two (or more) of the kind of event indicated by the suffix.	e.g. interlitter, intermonth, interoccurrence	Abstract	Temporal
inter-05	inter-05	A temporal position which is in between two successive events of the kind indicated by the suffix.	e.g. interday, interdiastolic, interpausal	Abstract	Temporal
inter-06	inter-06	A spatial position which is in between two adjacent landmarks of the kind indicated by the suffix.	e.g. interlexical, intercarinal, intercarbon	Abstract	Spatial
inter-07	inter-07	A spatial position between the suffixed landmark and an unspecified reference point.	e.g. interhippocampal, intermercurial, interelectrolyte	Abstract	Spatial
inter-08	inter-08	Mutually: the suffixed verb or property has a symmetric and bidirectional relationship between the relevant parties.	e.g. interlegible, interattraction, intercalibrate	Abstract	Influences
inter-09	inter-09	Combining together: the suffixed verb is done together, generally uniting or merging multiple objects.	e.g. interfuse, interknit, interreact	Abstract	Composition
inter-10	inter-10	Hybrid: combining two or more of the suffix together to produce a hybrid.	e.g. interculture, interhalogen, interprime	Abstract	Composition
inter-11	inter-11	Internally: the suffix verb is done in between or among relevant entities; also formining nouns and adjectives derived from the verb form.	e.g. intershine, interdistinguish, interreflection	Abstract	Linking
inter-12	inter-12	Interspatially: the suffixed verb is done between or among spatial entities; also forming nouns and adjectives derived from the verb form.	e.g. interfriction, interflow, intermesh, interlay	Abstract	Spatial
inter-13	inter-13	Intersocially: the suffixed verb is done between or among social entities; also forming nouns and adjectives derived from the verb form.	e.g. interact, intermarry, intergern	Abstract	Influences
inter-14	inter-14	Intermittently: the suffixed verb is done between or among temporal entities; also forming nouns and adjectives derived from the verb form.	e.g. intermention	Abstract	Temporal
inter-15	inter-15	Transferable: the suffixed entity is or can be transferred between multiple locales.	e.g. interavailable, intermural	Abstract	Influences
inter-16	inter-16	Alternating: a sequence of alternating kinds of the suffix.	e.g. interlaminate, interplant, interbed	Abstract	Temporal
inter-17	inter-17	Link: to connect multiple kinds of the suffix.	e.g. intercellular, interneuron, internetwork	Abstract	Composition
inter-18	inter-18	Abutment: to connect multiple spatial regions of the type indicated by the suffix.	e.g. interoceanic, intersesamoidian, interregional	Abstract	Spatial
inter-19	inter-19	Cooperating: to connect multiple social entities of the type indicated by the suffix.	e.g. interlaboratory, interservice, interliner	Abstract	Influences
inter-20	inter-20	Overlapping: the overlap of multiple kinds of the suffix.	e.g. interartistic, intercausative, intersectional	Abstract	Spatial
inter-21	inter-21	Involving multiple of the suffix.	e.g. interdisciplinary, intermodal, intergenetic	Abstract	Scope
inter-22	inter-22	Spanning across multiple time periods indicated by the suffix.	e.g. intergenerational, intersecular	Abstract	Temporal
inter-23	inter-23	Universal or independent of the suffixed social groups or time periods.	e.g. intermicronational, international, intercurrent	Abstract	Influences
inter-24	inter-24	Communal: a kind of the suffix which is shared among people.	e.g. interlanguage, interexperience, interownership	Abstract	Influences
inter-25	inter-25	Intermediate between multiple of the type indicated by the suffix.	e.g. intergenotype	Abstract	Intermediate
inter-26	inter-26	Midsection: an object which is positioned spatially between multiple of the suffix.	e.g. interbasin, interfascicle, intershell	Abstract	Spatial
inter-27	inter-27	Connector: an object of the type of the suffix has a spatial position which is in between.	e.g. interjoist, interarea	Abstract	Spatial
inter-28	inter-28	An intermediator or middleman between multiple social entities. The suffix indicates the kind of intermediator rather than the social entities.	e.g. intermediatrix	Abstract	Ranking
inter-29	inter-29	Inserting between multiple entities of the kind indicated by the suffix.	e.g. internym, interdental, interlinear	Abstract	Composition
inter-30	inter-30	Interlude: a time period or event which is intermediate between other time periods. The suffix indicates what the intermediate event is and not the surrounding periods.	e.g. interpause, interact, intercadence	Abstract	Temporal
inter-31	inter-31	Interval: an event or time period which is intermediate between time periods of the type indicated by the suffix. Here the surrounding time periods are indicated by the prefix and not the intervening event.	e.g. interlocution, interact, intercycle	Abstract	Temporal
inter-32	inter-32	(technology) Internet: relating to the internet or computer networking.	e.g. internetted, interblag	Technologies	Communication technologies
inter-33	inter-33	(LGBTQ) Intersex: relating to intersex people.	e.g. intersexual, intergender	Social facts	Political and social movements
intero-	intero-	From inside.		Abstract	Spatial			Inside
intestino-	intestino-	Intestines.		Body parts	Organs
intra-01	intra-01	Within a group or concept.	e.g. intraclade, intracoalition, intracorporate	Abstract	Composition			Among
intra-02	intra-02	Inside or with, in terms of location or position.	e.g. intrabone, intracardiac, intracolic	Abstract	Spatial
intra-03	intra-03	During, within a time period.	e.g. intraoperational, intradiurnal, intradecadal	Abstract	Temporal
intra-04	intra-04	Behaviour of a single individual.	e.g. intrajudge, intradoctor, intraparticipant	Abstract	Self
intra-05	intra-05	A direction that is inward or into the location indicated by the suffix.	e.g. intracavitary, intracloacal, intracistern	Abstract	Spatial
intra-06	intra-06	Indicating that the suffixed entry is internal in nature.	e.g. intramarry, intranet	Abstract	Linking
intra-07	intra-07	Between two or more similar entities that are within a larger entity. The suffix indicates the commonality between the entities.	e.g. intrachiral, intraploidy, intra-allelic	Abstract	Influences
intra-08	intra-08	Spatially located in between two points within the region indicated by the suffixed entity.	e.g. intramedian, intragalactic, intramolecular	Abstract	Spatial
intra-09	intra-09	Spatially located in between the suffixed entity and a reference point.	e.g. intramercurial, intrapetiolar, intraaxillary	Abstract	Spatial
intra-10	intra-10	The interior of the region indicated by the suffix.	e.g. intracalvarium, intracranium	Abstract	Spatial
intra-11	intra-11	A part of the suffixed entity.	e.g. intramountain, intradiegetic	Abstract	Composition			Part
intra-12	intra-12	In alignment or synchronous with the suffixed entity.	e.g. intrametric, intradirective	Abstract	Similarity	Synchrony		= Similar
intro-	intro-	Into, inwards.		Abstract	Spatial			Inward
Inver-	Inver-	Mouth of a river.		Proper nouns	Regions
io-	io-, iod-, iodo-	Iodine.		Chemical substances	Elements
iono-	iono-	Ions.		Particles	Particles
ipsi-	ipsi-	Same, on the same side of.	example(s) from: ipsilateral	Abstract	Spatial			Hither
Irano-	Irano-	Iran, Iranian.	e.g. Iranophone	Proper nouns	Extant countries
irid-	iri-, irid-, irido-, iris-, irrido-	The iris.	example(s) from: iridectomy	Body parts	Eyes
iridico-	iridico-	(chemistry) Iridic.		Chemical substances	Elements
iridio-	iridio-	(chemistry) Iridium.		Chemical substances	Elements
isch-	isch-	Insufficiency. (medicine) Restriction, holding back.	example(s) from: ischemia	Abstract	Insufficiency
ischio-	ischio-	The ischium.	example(s) from: w:ischioanal fossa	Body parts	Bones
Islamo-	Islamo-	Islam, Muslims.		Proper nouns	Religions/philosophies
iso-	is-, iso-	Equal, homogeneous, uniform. (chemistry) Isomer. For or from different individuals of the same species.	example(s) from: isochromatic, isotherm	Abstract	Similarity			= Uniformity
isoindol-	isoindol-	(chemistry) Isoindole derivative.		Chemical substances	Derivatives
isthmo-	isthm-, isthmo-	Having or involving an isthmus.		Abstract	Routing
Istro-	Istro-	Denoting Istrian origin or character, or a variety of [the prefixed element] associated with or pertaining to Istria.		Proper nouns	Historical countries
Italo-	Italo-, italo-	Italian.	e.g. Italophone	Proper nouns	Extant countries
ithy-	ithy-	Erect, straightened.		Abstract	Angles			Straight
ixod-	ixod-	Ticks.		Lifeforms	Animals

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Prefixes that start with J.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
J-	J-	(media) Used to denote nouns for things originating in Japan.		Proper nouns	Popular culture
Japano-	Japano-	Japan, Japanese.	e.g. Japanophone	Proper nouns	Extant countries
jaundo-	jaundo-	Yellow, jaundiced.		Colours, shapes, and textures	Colours	Hues		3 - Yellow
jejuno-	jejuno-	(medicine) The jejunum.		Body parts	Intestines
Jordano-	Jordano-	Jordan, Jordanian.		Proper nouns	Extant countries
jovi-	jovi-	Relating to the planet Jupiter.		Celestial bodies and their rotations	Solar system
Judeo-	Judaeo-, Judeo-, Judæo-	Judaism.		Proper nouns	Religions/philosophies
Jugo-	Jugo-	Yugoslavia, Yugoslavian.		Proper nouns	Historical countries
jugulo-	jugulo-	Jugular vein.		Body parts	Tubes and ducts
juridico-	juridico-	Jurisprudence, the law, legal infrastructure.		Social facts	Social institutions
juven-	juven-	Young.		Life stages	Life cycle
juxta-	juxta-	Near to.	example(s) from: w:juxtaglomerular apparatus	Abstract	Spatial			Near

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Prefixes that start with K.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
K-	K-	(media) Korean; used to denote nouns relating to the (popular) culture of South Korea.		Proper nouns	Popular culture
Kabardino-	Kabardino-	Kabardians.		Proper nouns	Historical countries
kal-	kal-	Potassium.	example(s) from: hyperkalemia	Chemical substances	Elements
Karelo-	Karelo-	Karelia; Karelian.		Proper nouns	Languages
Kartvelo-	Karto-, Kartvelo-	Georgia, Georgian.		Proper nouns	Extant countries
karyo-	kary-, karyo-	(biology) The nucleus.	e.g. karyotype, karyomiton, karyoplasm	Body parts	Cellular
Kazaco-	Kazaco-	Kazakhstan, Kazakh.		Proper nouns	Extant countries
Kenio-	Kenio-	Kenya, Kenyan.		Proper nouns	Extant countries
ker-	ka-, ker-	Onomatopoeic term for a thud.		Colours, shapes, and textures	Sounds			Onomatopoeia
kerato-	kerat-, kerato-	(anatomy) Cornea.<.	example(s) from: keratoscope	Body parts	Eyes
kerauno-	kerauno-	Thunderbolt, thunder, lightning.		Weather and natural disasters	Weather
kern-	kern-	Kernel, smaller but central part of an entity.	e.g. kernicterus, kernelization, kernelless	Abstract	Composition			Part
keto-	keto-	Ketone.		Chemical substances	Functional groups
Khmero-	Khmer-, Khmero-	Cambodia, Cambodian, Khmer.		Proper nouns	Extant countries
kibi-	kibi-	210.		Abstract: Quantity	Numbers	Factors		210.
kilo-	kilo-	Thousand. 1,000. (computing) 210.		Abstract: Quantity	Numbers	Factors		103
kine-	kine-, kinesio-, kineto-	Movement, motion.	example(s) from: akinetopsia, kinesthesia	Abstract	Basis
kinesi-	kinesi-	Movement, especially the movement of human body parts.		Abstract	Basis
klado-	klado-	(chemisty) A very open boron structure.		Abstract	Chemical structures
klepto-	klepto-	Stealing.		Human activities	Other human activities
koilo-1	koil-1, koilo-1	Concave.	e.g. koilonychia, koilosternia	Abstract	Angles			Concave
koilo-2	koil-2, koilo-2	Hollow, empty.	example(s) from: koilocyte2	Abstract	Fullness			Empty
Koreo-	Koreo-	Korea, Korean.		Proper nouns	Extant countries
krypto-	krypto-	Krypton.	e.g. kryptonate	Chemical substances	Elements
Kurdo-	Kurdo-	Kurdish.	e.g. Kurdophone	Proper nouns	Languages
kymo-	kymo-	Wave, waveform.		Colours, shapes, and textures	Shapes			Curly
kyph-	kyph-, kypho-	Bent, humped, hunchbacked.	example(s) from: kyphoscoliosis	Abstract	Angles			Bent
Kyrgyzo-	Kyrgyzo-	Kyrgyzstan, Kyrgyz.	e.g. Kyrgyzophone	Proper nouns	Extant countries

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Prefixes that start with L.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
La-	La-	(US, African-American Vernacular, anthroponymy) Used in African-American female given names.		Proper nouns	Personal names
labio-	labi-, labio-	The lips.	example(s) from: labiodental	Body parts	Anatomical regions
Lacono-	Lacono-	Sparta.		Proper nouns	Historical countries
lacto-	lact-, lacti-, lacto-	Milk.	example(s) from: lactation, lactose	Body parts	Bodily fluids
lalo-	lalo-	Speech, speaking.		Human activities	Language
lamino-	lamino-	A thin layer.		Abstract	Layers
laparo-	lapar-, laparo-	The abdominal wall; operations through it.	example(s) from: laparotomy	Body parts	Muscles
laryngo-	laryng-, laryngo-	The larynx.	e.g. laryngitis, laryngectomy	Body parts	Organs
latero-	latero-	To one side.	example(s) from: w:lateral pectoral nerve	Abstract	Spatial			Side
Latino-	Latino-	Latin, Latin America.		Proper nouns	Regions
Lebano-	Lebano-	Lebanon, Lebanese.		Proper nouns	Extant countries
Lechito-	Lechito-	Lechia, Lechite.		Proper nouns	Historical countries
leg-	leg-	Law, legal.		Social facts	Social institutions
leicitho-	leicitho-	Egg yolk.		Body parts	Membranes
leio-	lei-, leio-	Smooth.	example(s) from: leiomyoma	Colours, shapes, and textures	Textures			1 - Smooth
Lemko-	Lemko-	Lemko.		Proper nouns	Historical countries
lepido-	lepido-	Scaly, particularly scaly skin.	e.g. lepidote, Lepidoptera	Colours, shapes, and textures	Shapes			Bumpy
lepro-	lepro-	Leprosy.		Body processes	Pathological
lepto-	lept-, lepto-	Narrow, thin.	example(s) from: leptomeningeal	Abstract	Size			Narrow
lesbo-	lesbo-	Lesbian.	e.g. lesbophobe, lesbophilia, lesbosexual	Social facts	Political and social movements
Letto-	Letto-	Latvian, Latvia.	e.g. Lettophone	Proper nouns	Extant countries
leuko-	leuc-, leuco-, leuk-, leuko-	White. (medicine) Colourless.	example(s) from: leukocyte	Colours, shapes, and textures	Colours	Hues		1 - White
levi-	levi-	To lighten, to make less heavy.		Abstract	Mass
levo-	laevo-, lev-, levo-, lævo-	On or to the left.		Abstract	Spatial			Left
lexi-	lexi-	Word, lexeme.		Academic disciplines	Linguistics
lexico-	lexico-	Words, speech.		Academic disciplines	Linguistics
libre-	libre-	Free, particularly open source.		Abstract	Flexibility
libro-	libro-	Book.		Technologies	Communication technologies
Libyco-	Libyco-	Libya, Libyan.		Proper nouns	Extant countries
lieno-	lien-, lieno-	The spleen.		Body parts	Organs
ligato-	ligato-	To bind, tie.		Abstract	Composition			Un-joining
lign-	lign-, ligno-	Made of wood, wooden.	e.g. lignivorous, lignification, lignicolous	Body parts	Integument
Liguro-	Liguro-	Liguria, Ligurian.		Proper nouns	Historical countries
like-	like-	Similar.		Abstract	Similarity			= Similar
limno-	limn-, limno-	Body of fresh water.		Landforms and ecosystems	Landforms
linguo-1	ling-1, lingua-1, linguo-1	Tongue.	e.g. linguobuccal, linguodistal	Body parts	Organs
linguo-2	ling-2, lingua-2, linguo-2	Language, linguistics.	e.g. linguocultural, lingueme, linguonym	Academic disciplines	Societal
lipo-	lip-, lipo-	Fat.	example(s) from: liposuction	Body parts	Connective tissues
liss-	liss-, lissos-	(medicine) Smooth.	example(s) from: lissencephaly	Colours, shapes, and textures	Textures			1 - Smooth
litha-	litha-	(chemistry) Having a lithium atom replace hydrogen in an organic compound.		Chemical substances	Substituents
lithio-	lithio-	Lithium.		Chemical substances	Elements
Litto-	Litto-	Lithuanian, Lithuania.		Proper nouns	Extant countries
lobo-	lobo-	Lobe (brain or lungs).		Body parts	Anatomical regions
loc-	loc-	Place, location.		Abstract	Basis
logico-	logico-	Logic.	e.g. logico-linguistic, logicomathematical	Academic disciplines	Mathematical
logo-	log-, logo-	Words.	e.g. logogram, logopathy, logorrhea	Academic disciplines	Linguistics
lopho-1	lopho-1	Crest, ridge.	e.g. lophodont deeth	Colours, shapes, and textures	Shapes			Bumpy
lopho-2	lopho-2	Tuft. Multiple flagella.	e.g. lophotrichous, lophophore	Colours, shapes, and textures	Shapes			Branching
ludo-	ludo-	Games, especially video games.		Human activities	Types of media
lumbo-	lumb-, lumba-, lumbo-	Lower back.	example(s) from: w:lumbar vertebrae	Body parts	Anatomical regions
lumino-	lumino-	Light, illumination.		Colours, shapes, and textures	Colours	Shades		1 - White
luni-	luni-	Moon.		Celestial bodies and their rotations	Solar system
Luso-	Lusitano-, Luso-, luso-	Portuguese, Portugal.	e.g. Lusophone	Proper nouns	Extant countries
luteo-	luteo-	(medicine) Corpus luteum.		Body parts	Organs
lyco-	lyc-, lyco-	Wolf.		Lifeforms	Animals
lympho-	lymph-, lympho-	Lymph.	example(s) from: lymphedema	Body parts	Bodily fluids
lyo-	ly-, lyo-	Dispersion, dissolution.		Abstract	Composition			Un-joining
lyso-	lys-, lyso-	Disintegration, breakdown.	example(s) from: lysosome	Abstract	Composition			Un-joining

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Prefixes that start with M.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
Mac-	Mac-	A patronymic used to form common Irish and Scottish names, similar to the English -son.		Proper nouns	Personal names
Macedo-	Macedo-	Macedonia.		Proper nouns	Extant countries
macro-1	macr-1, macro-1	large.	e.g. macronucleus	Abstract	Size			Big
macro-2	macr-2, macro-2	long.	e.g. macrobiotics	Abstract	Size			Long
macro-3	macr-3, macro-3	inclusive.	e.g. macroinstruction	Abstract	Inclusion
macro-4	macr-4, macro-4	(augmentative) intensely, extremely, or exceptional.		Abstract	Normality			Intensifying
macro-5	macr-5, macro-5	Great in scope or scale, to analyse at a high level, or existing in such a frame of reference.	e.g. macrosociology, macroanatomy, macrobenthos	Abstract	Scope
macro-6	macr-6, macro-6	Large in quantity.	e.g. macronutrient, macrodose	Abstract: Quantity	Quantity	Amount		> Much
magico-	magico-	Magic, magical.		Social facts	Religion & mythology
magnesio-	magnesio-	Pertaining to magnesium.		Chemical substances	Elements
magnet-	fmagnet-, mag-, magneto-	Magnet, magnetism.		Physical properties	Other physical properties
magni-	magni-	Large, big.		Abstract	Size			Big
Magyaro-	Magyaro-	Hungary, Hungarian, Magyar.		Proper nouns	Extant countries
mal-	mal-, male-2	Bad, faulty. not. abnormal. inadequate.	example(s) from: malnourish, maladjusted	Abstract: Correctness	Correctness	Goodness		! Bad
malaco-	malaco-	Soft.		Colours, shapes, and textures	Textures			0 - Soft
malario-	malario-	Malaria.		Body processes	Pathological
Malayo-	Malayo-, Malaysio-	Malaysia, Malaysian.	e.g. Malayophone	Proper nouns	Extant countries
male-1	male-1	Male, men.		Life stages	Genders
malto-	malto-	(chemistry) Maltose.		Chemical substances	Biochemistry
mammillo-	mammill-, mammillo-	(anatomy) Nipple.	example(s) from: mammillaplasty, mammillitis	Body parts	Orifices
mammo-	mamm-, mammo-	Breasts.	example(s) from: mammogram	Body parts	Anatomical regions
mandibulo-	mandibulo-	Mandible.		Body parts	Bones
mangan-	mangan-, mangano-1	Manganese.		Chemical substances	Elements
mangani-	mangani-	Manganic.		Chemical substances	Elements
mangano-2	mangano-2	Manganous.		Chemical substances	Elements
mani-	mani-, many-	Many, multiple.		Abstract: Quantity	Quantity	Amount		> Much
Manju-	Manju-	Manchuria.		Proper nouns	Historical countries
manno-	manno-	Mannose.		Chemical substances	Biochemistry
manu-	manu-	(anatomy) Hand.	example(s) from: manufacture	Body parts	Anatomical regions
mar-	mar-	(metallurgy) Relating to the production of martensite grains in steel.		Chemical substances	Materials
Marathi-	Marathi-	Marathi.	e.g. Marathiphone	Proper nouns	Languages
Marchigiano-	Marchigiano-	Marche.		Proper nouns	Historical countries
Marcho-	Marcho-	Altmark.		Proper nouns	Historical countries
masso-	masso-	Massage.		Human activities	Healing
mast-1	mast-1, masto-1	Breasts, nipples, udders, teats.	example(s) from: mastectomy	Body parts	Orifices
mathematico-	mathematico-	Mathematics, mathematical.		Academic disciplines	Mathematical
matri-	materno-, matr-, matri-	Mother, motherhood.		Life stages	Life cycle
maxi-	maxi-	Larger than usual.	example(s) from: maxi-skirt, maximum	Abstract	Size			Bigger
maxillo-	maxillo-	The jaw.		Body parts	Anatomical regions
Mc-	Mc-	A patronymic used to form common Irish and Scottish names, similar to the English -son. (informal) Used to create mock names.		Proper nouns	Personal names
meato-	meato-	(medicine) Meatus (opening).		Body parts	Orifices
mebi-	mebi-	220.		Abstract: Quantity	Numbers	Factors		220
mechano-	mechano-	Mechanical.	e.g. mechanostability, mechanosensation, mechanofusion	Academic disciplines	Natural
meco-	meco-	Length or distance.		Abstract	Spatial
medico-	medico-	Medicine (“profession”); medical.		Academic disciplines	Health sciences
medio-	medio-, mesio-	Middle.		Abstract	Spatial			Centre
Medo-	Medo-	Pertaining to Media, Median or the Medes.		Proper nouns	Historical countries
mega-2	meg-2, mega-2	Million, 106. (computing) 220. (computing, marketing) 210 * 103. great, large.	e.g. megagram, megaton	Abstract: Quantity	Numbers	Factors		106
megalo-1	meg-11, mega-11, megal-1, megalo-1	Large in size, enormous.	e.g. megalocardia, megalophobia, megalopolis	Abstract	Size			Big
megalo-2	meg-21, mega-21, megal-2, megalo-2	Grand, great.	e.g. megalography, megalomania	Abstract: Correctness	Correctness	Goodness		= Good
Megleno-	Megleno-	Almopia.		Proper nouns	Historical countries
meio-	meio-	Less, fewer, reduction.	e.g. meiobenthos	Abstract: Quantity	Quantity, relative	Inequality		< Less
mela-	mela-	Black; dark.		Colours, shapes, and textures	Colours	Shades		4 - Black
melano-	melan-, melano-	Black.	example(s) from: melanin	Colours, shapes, and textures	Colours	Shades		4 - Black
melo-	melo-	Melody.		Academic disciplines	Linguistics
membrano-	membrano-	Membrane.		Body parts	Membranes
meningo-	mening-, meningo-	The meninges.	example(s) from: meninges, meningitis	Body parts	Membranes
meno-1	men-1, meno-1	Month, monthly.	e.g. menology	Celestial bodies and their rotations	Time periods
meno-2	men-2, meno-2	Menses, menstruation.	example(s) from: menopause, menorrhagia	Body processes	Reproduction
mento-	mento-	The chin.		Body parts	Anatomical regions
mer-1	mer-1	Sea; marine.		Landforms and ecosystems	Oceanic
mer-2	mer-2	Applied to animals that are fully or partly sea-creatures.	e.g. mercow, mersnake, mereswine	Lifeforms	Animals
mer-3	mer-3	(fantasy) Mermaids, mermen.		Social facts	Religion & mythology
mercapto-	mercapto-	An organosulfur compound that contains a carbon-bonded sulfhydryl or sulphydryl.		Chemical substances	Radicals
mercuri-	mercuri-	Relating to the planet Mercury.		Celestial bodies and their rotations	Solar system
mercurico-1	mercurico-1	Mercury.		Chemical substances	Elements
mercurico-2	mercurico-2	(chemistry) Mercuric.		Chemical substances	Elements
mero-	mer-3, mero-	Partly, partial. (anatomy) Part, component.	example(s) from: merocrine, meroblastic	Abstract	Composition			Part
meso-01	mes-01, meso-01	Middle or centre in location/position.	e.g. Mesoamerica, mesohepatectomy, mesoscaphe	Abstract	Spatial
meso-02	mes-02, meso-02	Between a macro- scale and micro- scale in scope or analysis.	e.g. mesoeconomics, mesoevolution, mesometeorology	Abstract	Scope
meso-03	mes-03, meso-03	Medium in size.	e.g. mesobrowser, mesocavern, mesohabitat	Abstract	Size			Medium
meso-04	mes-04, meso-04	Between.	e.g. mesochannel, mesoclitic, mesolayer	Abstract	Spatial
meso-05	mes-05, meso-05	Intermediate between two properties or characteristics.	e.g. mesocratic, mesognathous, mesohydrophyte	Abstract	Intermediate
meso-06	mes-06, meso-06	(anatomy) Referring to the mesentery.	e.g. mesoappendix, mesoduodenum, mesogastrium	Body parts	Membranes
meso-07	mes-07, meso-07	(anatomy) Mesial in location, position, or direction: towards the midline of the body.	e.g. mesoanterior, mesomedial, meson	Abstract	Spatial
meso-08	mes-08, meso-08	Normal, average, or typical.	e.g. mesochronic, mesocrystal, mesokurtosis	Abstract	Normality			Normal
meso-09	mes-09, meso-09	(dentistry) The forward side of a tooth.	e.g. mesocone, mesoflexus, mesoloph	Abstract	Spatial
meso-10	mes-10, meso-10	The middle of a time period, or medium in duration.	e.g. mesocenozoic, mesocratic, Mesolithic	Abstract	Temporal
meso-11	mes-11, meso-11	Quasi or partial.	e.g. mesocarnivore, mesobilirubin, mesoparasite	Abstract	Similarity
meso-12	mes-12, meso-12	Moderate, medium in quantity.	e.g. mesoendemic, mesoeutrophic, mesohaline	Abstract: Quantity	Quantity	Amount		= Medium
meso-13	mes-13, meso-13	(chemistry) Designating an achiral member of a group of diastereoisomers that has at least one chiral member.	e.g. mesotartaric acid, mesolytic	Chemical substances	Forms
Messapo-	Messapo-	Messapii.		Proper nouns	Historical countries
meta-01	met-01, meta-01	(anatomy and zoology) Behind.		Abstract	Spatial
meta-02	met-02, meta-02	(botany and zoology) Later or subsequent.		Abstract	Temporal
meta-03	met-03, meta-03	(obsolete, architecture and zoology) Situated between two segments.		Abstract	Spatial
meta-04	met-04, meta-04	(chemistry) Having fewer molecules of water than the ortho- equivalent.		Abstract: Quantity	Quantity, relative	Inequality		< Less
meta-05	met-05, meta-05	(organic chemistry) In isomeric benzene derivatives, having the two substituents in alternate (1,3) positions; From 1833.		Abstract	Chemical structures
meta-06	met-06, meta-06	(biochemistry) Relating to metabolism.		Body processes	Cellular processes
meta-07	met-07, meta-07	Transcending, encompassing.		Abstract	Transcendence
meta-08	met-08, meta-08	Pertaining to a level above or beyond; reflexive or recursive; about itself or about other things of the same type. For example, metadata is data that describes data, metalanguage is language that describes language, etc.		Abstract	Inclusion
meta-09	met-09, meta-09	Having analogies with metaphysics.		Abstract	Conceptual
meta-10	met-10, meta-10	(geology) Modified by metamorphosis; analogies and derivatives of metamorphism.		Chemical substances	Materials
meta-11	met-11, meta-11	(pathology) Consequent on.		Abstract	Influences			Consequent
metacarpo-	metacarp-, metacarpo-	Metacarpals.		Body parts	Bones
metallo-	metallo-	Metal, metallic.		Physical properties	Other physical properties
metatarso-	metatars-, metatarso-	Metatarsals.		Body parts	Bones
meteoro-	meteoro-	Related to weather.		Weather and natural disasters	Weather
metho-	meth-, metho-	(chemistry) Methyl.		Chemical substances	Functional groups
methoxy-	methoxy-	(chemistry) The univalent radical CH3-O- derived from methanol.		Chemical substances	Derivatives
methyl-	methyl-	(chemistry) Used to form terms describing the attachment of a methyl group.		Chemical substances	Substituents
metro-1	metr-1, metro-1	Metropolitan, city.	e.g. metropolis, metro-link	Social facts	Social institutions
metro-2	metr-2, metro-2	(medicine) The uterus.	example(s) from: metrorrhagia	Body parts	Organs
metro-3	metr-3, metro-3	Measurement, the study of measurement.	e.g. metrology, metromania	Academic disciplines	Mathematical
metro-4	metr-4, metro-4	(poetry) Meter.		Academic disciplines	Linguistics
Mexico-	Mexico-	Mexico, Mexican.		Proper nouns	Extant countries
micro-1	micr-1, micro-1	Very small.	example(s) from: microbacillus, microscope	Abstract	Size			Small
micro-2	micr-2, micro-2	10-6.	e.g. microgram, micrometre	Abstract: Quantity	Numbers	Factors		10-6
micromicro-	micromicro-	(obsolete) Pico- (in the names of SI units).		Abstract: Quantity	Numbers	Factors		10-12
micto-	micto-	Mixed.		Abstract	Composition			Hybrid
mid-1	mid-1	Denoting the middle part.	e.g. mid-1930s, mid-30s, midlife	Abstract	Temporal
mid-2	mid-2	Occupying a middle position.	e.g. mid-shoulder	Abstract	Spatial
mid-3	mid-3	Intermediate.	e.g. mid-key	Abstract	Intermediate
mid-4	mid-4	Amid.		Abstract	Composition			Among
mid-5	mid-5	During, in the middle of doing something.	e.g. mid-jump	Abstract	Temporal
midi-	midi-	Medium sized.	example(s) from: midi-length, Midibus	Abstract	Size			Medium
migra-	migra-	Migration, wandering.		Abstract	Motion
milli-	milli-	10-3. thousand.	example(s) from: milliliter	Abstract: Quantity	Numbers	Factors		10-3
millimicro-	millimicro-	(obsolete) Nano- (in the names of SI units).		Abstract: Quantity	Numbers	Factors		10-9
millimilli-	millimilli-	(obsolete) Micro- (in the names of SI units).		Abstract: Quantity	Numbers	Factors		10-6
mini-	mini-	Small.	example(s) from: minimarket, mini-room, minivan	Abstract	Size			Small
mis-1	mis-1	Bad or wrong, badly or wrongly.	e.g. misbehave, misaccumulation	Abstract: Correctness	Correctness	Goodness		! Bad
mis-2	mis-2	To fail or failure.	e.g. miscarriage, misacknowledge	Abstract	Completion
mis-3	mis-3	Unintentionally, accidentally, mistakenly.	e.g. misdeleted, mishap, mischance	Abstract	Intention			Intention
mis-4	mis-4	False, falsely.	e.g. misaccusation	Abstract: Correctness	Correctness	Truth		! False
miso-	miso-	Hatred.		Body processes	Emotion
mito-1	mit-1, mito-1	Thread, string.		Colours, shapes, and textures	Shapes			Filiform
mito-2	mit-2, mito-2	(biology) Mitosis.		Body processes	Cellular processes
mito-3	mit-3, mito-3	(pharmacology) Used to form names of nucleotoxic agents used as antineoplastics.		Chemical substances	Pharmacological
mnemo-	mnemo-	Memory.		Body processes	Bodily needs and functions
Moeso-	Moeso-	Moesia.		Proper nouns	Historical countries
molyb-	molyb-	Molybdenum.	e.g. molybdenite, molybdian	Chemical substances	Elements
Mongolo-	Mongolo-	Mongolia, Mongols, Mongolian.		Proper nouns	Extant countries
mono-1	mon-1, mono-1	One.	example(s) from: monogamy, monotone, monosyllabic, monomial, monobrow	Abstract: Quantity	Numbers	Cardinal		1
mono-2	mon-2, mono-2	Single, alone, limited.	e.g. monochrome, monopsony, monocity	Abstract	Similarity
Moravo-	Moravo-	Moravia; Moravian.		Proper nouns	Historical countries
morpho-	morph-, morpho-	Shape, form, morphology.	example(s) from: morphology	Abstract	Basis
mort-	mort-	Death.		Life stages	Life cycle
moto-1	moto-1	Motorcycle.		Technologies	Transportation
moto-2	moto-2	(biology) Motor; movement.		Body processes	Bodily needs and functions
muco-	muci-, muco-	Mucus.		Body parts	Bodily fluids
mucoso-	mucoso-	(medicine) Mucosal. referring to a mucosa (i.e., a mucous membrane).		Body parts	Membranes
multi-	multi-	Many.	example(s) from: multicultural, multi-storey, multitude	Abstract: Quantity	Quantity	Amount		> Much
musculo-	muscul-, musculo-	Muscle.	example(s) from: w:musculoskeletal system	Body parts	Muscles
musico-	musico-	Music.		Human activities	Types of media
muta-	muta-	Mutation, change.		Abstract	Similarity			! Change
myco-	myc-, myco-	Fungus, mushroom.	example(s) from: onychomycosis	Lifeforms	Fungi
mydro-	mydro-	Wide.		Abstract	Size			Wide
myel-	myel-, myelo-	Bone marrow, spinal cord.	example(s) from: w:myelin sheath, myeloblast	Body parts	Bones
mylo-	mylo-	(anatomy) Of or pertaining to the molars.	example(s) from: w:mylohyoid nerve	Body parts	Teeth
myo-	my-2, myo-	Muscle.	example(s) from: myoblast	Body parts	Muscles
myria-	my-1, myri-, myria-, myrio-	Ten thousand. 10,000.	example(s) from: myriad	Abstract: Quantity	Numbers	Factors		104
myringo-	myring-, myringo-	Eardrum.	example(s) from: myringotomy	Body parts	Membranes
myrmeco-	myrmeco-	Ants.		Lifeforms	Animals
Myso-	Myso-	Mysia.		Proper nouns	Historical countries
mytho-	mytho-	Mythology.		Human activities	Types of media
myxo-	myx-, myxo-	Mucus.	example(s) from: myxoma	Body parts	Bodily fluids

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Prefixes that start with N.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
nab-	nab-	(pharmacology) Cannabinoid receptor agonist.		Chemical substances	Pharmacological
nal-	nal-	(pharmacology) Opiod receptor agonist.		Chemical substances	Pharmacological
nano-1	nan-1, nano-1	10-9.	example(s) from: nanogram, nanosecond	Abstract: Quantity	Numbers	Factors		10-9
nano-2	nan-2, nano-2	Nanotechnology.	e.g. nanobiology	Technologies	Types of technologies
nano-3	nan-3, nano-3	Very small, nanoscale.	e.g. nanoparticle, nanoplankton	Abstract	Size			Small
naphtho-	naphtho-	(chemistry) Napthalene.		Chemical substances	Compounds
narco-1	narc-1, narco-1	Stupor, sleep.	example(s) from: narcolepsy	Body processes	Bodily needs and functions
narco-2	narc-2, narco-2	Narcotics.	e.g. narcotherapy, narcoterrorism	Chemical substances	Pharmacological
naso-	nas-, naso-	The nose.	example(s) from: nasal	Body parts	Organs
nat-	nat-, nati-, nato-	Birth.	example(s) from: neonatology	Life stages	Life cycle
natro-	natr-, natro-	Sodium.		Chemical substances	Elements
Navarro-	Navarro-	Navarre, Navarrese.		Proper nouns	Historical countries
necro-	necr-, necro-	Death.	example(s) from: necrosis, w:necrotizing fasciitis	Life stages	Life cycle
nega-	nega-	Negative.		Abstract	Negation
negro-	negro-, nigro-	Black.		Colours, shapes, and textures	Colours	Shades		4 - Black
nemat-	nemat-, nemato-	Filiform structure, thread.		Colours, shapes, and textures	Shapes			Filiform
neo-	neo-	New, recent.	example(s) from: neolithic, neoether	Abstract	Temporal			3 - New
Nepalo-	Nepalo-	Nepal, Nepali.		Proper nouns	Extant countries
nepho-	nepho-	Clouds.		Weather and natural disasters	Weather
nephro-	nephr-, nephro-	The kidneys.	example(s) from: nephrology	Body parts	Organs
neptuni-	neptuni-	Relating to the planet Neptune.		Celestial bodies and their rotations	Solar system
nervo-	nerv-, nervo-	Nerve.	example(s) from: nerve, w:nervous system	Body parts	Nerves
nether-	nether-	Low, lower, below, under, beneath. Inferior.		Abstract	Spatial			Downward
neuro-1	neur-1, neuri-1, neuro-1	Nerves, nervous tissue, or the nervous system.	e.g. neuropathy, neurospinal, neurodynamics	Body parts	Organ systems
neuro-2	neur-2, neuri-2, neuro-2	Neurodivergent or neurodiversity.	e.g. neuroqueer, neurospicy	Social facts	Political and social movements
neutro-	neutro-	Neutral, neither.		Abstract	Polarity			Neutrality
nevo-	nevo-	(medicine) Nevus skin lesion.		Body processes	Pathological
new-	new-	New, recent.		Abstract	Temporal			3 - New
nido-	nido-	Nest.		Colours, shapes, and textures	Shapes			Conical
nifur-	nifur-	(pharmacology) 5-nitrofuran.		Chemical substances	Pharmacological
Nigerio-	Nigerio-	Nigerian, Nigeria.		Proper nouns	Extant countries
nil-	nil-	Zero.		Abstract: Quantity	Numbers	Cardinal		0
Nilo-	Nilo-, Niloto-	The Nile river.		Proper nouns	Regions
niob-	niob-	Niobium, Columbium.	e.g. niobic, niobous	Chemical substances	Elements
Nippo-	Nippo-	Japanese, Japan.		Proper nouns	Extant countries
nitro-	nitr-, nitro-	Nitrogen.		Chemical substances	Elements
noci-	noci-	Pain, harm.	example(s) from: nociception	Body processes	Sensory
noct-	noct-	The night.		Celestial bodies and their rotations	Time periods
nodo-	nodo-	Lumpy, nodular.		Colours, shapes, and textures	Shapes			Bumpy
nomen-	nomen-	Name.		Academic disciplines	Linguistics
nomino-	nomino-	(linguistics) The nominative case.		Academic disciplines	Linguistics
nomo-1	nom-1, nomo-1	Law.		Social facts	Social institutions
nomo-2	nom-2, nomo-2	Names.		Academic disciplines	Linguistics
non-1	non-1	Not.	e.g. nonaboriginal, nonabrasive, nonabstract	Abstract	Negation
non-2	non-2	Absence, lack of.	e.g. nonaccountability, nonacceleration, nonaction	Abstract	Completion
non-3	non-3	Avoiding.	e.g. nonabiding, nonacceptance, nonaccumulative	Abstract	Routing
non-4	non-4	Neutral.	e.g. nonaccent, nonacrocentric, nonaccent	Abstract	Polarity			Neutrality
nona-	non-5, nona-	Nine.		Abstract: Quantity	Numbers	Cardinal		9
nonadeca-	nonadeca-	19.		Abstract: Quantity	Numbers	Cardinal		19
noo-	noo-	The mind.		Body parts	Brain
nor-	nor-	(chemistry) Organic compound that is the parent of another.		Abstract	Parenthood
norm-	norm-, normo-2	(medicine) Normal.	example(s) from: normocapnia	Abstract	Normality			Normal
Normanno-	Normanno-	Normandy, the Normans, or the Norman language.		Proper nouns	Historical countries
normo-1	normo-1	Rule, order, norms.		Social facts	Social institutions
Norvego-	Norvego-	Norwegian, Norway.		Proper nouns	Extant countries
noso-	noso-	Disease.		Body processes	Pathological
notho-	notho-	Used to indicate a hybrid taxonomic element.		Abstract	Composition			Hybrid
noto-1	noto-1	South, southern.		Abstract	Spatial			Cardinal
noto-2	noto-2	(paleontology) South America.		Proper nouns	Regions
nucleo-	nucleo-	Nuclear, a nucleus.		Particles	Particles
nudi-	nudi-	Naked.		Abstract	Covering
nulli-	nulli-	Null.		Abstract: Quantity	Numbers	Cardinal		0
numero-	numero-	Number, numbers.		Academic disciplines	Mathematical
nutri-	nutri-	Nutrition.		Academic disciplines	Health sciences
nyct-1	nyct-1, nycto-1	The night.		Celestial bodies and their rotations	Time periods
nyct-2	nyct-2, nycto-2	Darkness.		Colours, shapes, and textures	Colours	Shades		3 - Dark
nympho-	nympho-	Nymph. Adolescent girl.		Life stages	Life cycle

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Prefixes that start with O.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
ob-1	ob-1, os-1	Inverse, reverse, particularly in shape.	e.g. obclavate, obconic, obcordate	Abstract	Negation
ob-2	ob-2, os-2	Against.	e.g. object, oblatration	Abstract	Polarity			Opposition
ob-3	ob-3, os-3	To place before, go up to.	e.g. obtend, obverse, obreption	Abstract	Spatial			Towards
ob-5	ob-5, os-5	Before.	e.g. obvention, observant	Abstract	Temporal
ob-6	ob-6, os-6	Not quite, almost.	e.g. obdormition, obrotund	Abstract	Similarity
obstetro-	obstetro-	Obstetrics; pregnancy and birth.		Body processes	Reproduction
occipito-	occipit-, occipito-	The occipital bone.		Body parts	Bones
Occitano-	Occitano-	Occitania, Occitan.	e.g. Occitanophone	Proper nouns	Languages
ochl-	ochl-	Mob, mob-rule.	e.g. ochlagogue, ochlocracy, ochlocrat	Social facts	Social and political movements
ochlo-	ochlo-	Crowd of people, crowding, to form a crowd of people.		Human activities	Other human activities
octa-	oct-, octa-, octakis-, octo-	Eight.		Abstract: Quantity	Numbers	Cardinal		8
octadeca-	octadeca-	Eighteen.		Abstract: Quantity	Numbers	Cardinal		18
oculo-	ocul-, oculo-	The eyes.	example(s) from: w:Oculist	Body parts	Organs
odo-	hodo-, odo-	Relating to roads.		Technologies	Transportation
odonto-	odont-, odonto-	Teeth.	example(s) from: orthodontist	Body parts	Teeth
odyno-	odyn-, odyno-	Pain.	example(s) from: stomatodynia	Body processes	Pathological
oeno-	eno-, oeno-, œno-	Wine.	e.g. oenochemistry, oenometer, oenocyte	Chemical substances	Foods
Of-	Of-	(UK) A regulatory body for a specified industry.		Social facts	Social institutions
off-	off-	Away from, off.	example(s) from: off-color, offish, offset	Abstract	Spatial			Away
oleo-1	oleo-1	Oil.		Chemical substances	Biochemistry
oleo-2	oleo-2	Oily.		Physical properties	Tasteable properties
olfacto-	olfacto-	Smell.		Body processes	Sensory
olig-	olig-, oligo-	Few.	example(s) from: oligotrophy	Abstract: Quantity	Quantity	Amount		< Not much
olivo-	olivo-	(anatomy) Olivary body.		Body parts	Brain
Omano-	Omano-	Oman, Omani.		Proper nouns	Extant countries
ombro-	ombro-	Rain.		Weather and natural disasters	Weather
omento-	omento-	Omentum.		Body parts	Membranes
omni-	omni-	All, universal.	example(s) from: omnipotent, omnipresent, omnivore	Abstract	Composition			Whole
omo-	om-, omo-	The shoulder.	example(s) from: omoplate	Body parts	Anatomical regions
omphalo-	omphal-, omphalo-	The navel.	example(s) from: omphalotomy	Body parts	Anatomical regions
on-	on-	On, toward, forward.	example(s) from: onset, onlook, ongoing, oncoming	Abstract	Spatial			Towards
onco-	onco-	Tumour, cancer.	example(s) from: oncology	Body processes	Pathological
oneiro-	oneir-, oneiro-	Dreaming.		Body processes	Bodily needs and functions
onomato-	onomato-	Name; word.		Academic disciplines	Linguistics
onto-	onto-	Existence, being.		Abstract	Transcendence
onych-	onych-, onycho-	Nails, claws.	example(s) from: onychophagy	Body parts	Integument
oo-	oo-, oö-	Egg.	example(s) from: oogenesis	Body parts	Gametes
oophor-	oophor-, oophoro-	Ovary. The ovaries.	example(s) from: oophorectomy	Body parts	Organs
ophio-	ophid-, ophio-	Snakes.		Lifeforms	Animals
ophryo-	ophry-, ophryo-	The eyebrow.		Body parts	Anatomical regions
opistho-	opistho-	Back, behind, rear.	example(s) from: opisthotonus	Abstract	Spatial			Back
opsono-	opsono-	Opsonin.		Chemical substances	Biochemistry
opthalmo-	ophthalmo-, opthalm-	Of or relating to eyes.	example(s) from: ophthalmology	Body parts	Organs
optic-	optic-, optico-	Vision.	example(s) from: opticochemical	Body processes	Sensory
opto-	opto-	Optical.		Body processes	Sensory
or-1	or-1	(non-productive) Out, outwards, laid out.	e.g. ordeal, orlay	Abstract	Spatial			Outward
or-2	or-2	(non-productive) Without, does not have.	e.g. orped	Abstract	Possession
or-3	or-3	(non-productive) From the outset; original.	e.g. ort, orgulous	Abstract	Temporal
orbito-	orbito-	(anatomy) Orbit.		Body parts	Cavities
orchi-	orch-, orchi-, orchid-, orchido-, orchio-, orcho-	Testicles.	example(s) from: orchiectomy, orchidectomy	Body parts	Organs
organo-1	organo-1	(biology) Organs.		Body parts	Organs
organo-2	organo-2	Organic. (chemistry) Organic chemistry.		Academic disciplines	Natural
ornitho-	ornith-, ornitho-	Birds.		Lifeforms	Animals
oro-1	oro-1	The mouth.	example(s) from: oral	Body parts	Orifices
oro-2	oro-2	Mountains.	e.g. orogeny	Landforms and ecosystems	Landforms
Oromo-	Oromo-	Oromo.		Proper nouns	Historical countries
ortho-01	orth-01, ortho-01	Right angle, perpendicular.	e.g. orthogon, orthocentric, orthoclastic	Abstract	Angles
ortho-02	orth-02, ortho-02	Proper, righteous.	e.g. orthorexia, orthotaxon, orthology	Abstract: Correctness	Correctness	Goodness		= Good
ortho-03	orth-03, ortho-03	To correct or fix.	e.g. orthophotography, orthoptics, orthodontics	Abstract	Influences	Fixing
ortho-04	orth-04, ortho-04	Same, from the same.	e.g. orthocousin, cross-cousin, orthogamy	Abstract	Similarity			= Similar
ortho-05	orth-05, ortho-05	Normal, ordinary.	e.g. orthocclusion, orthodromic, orthogravitropism	Abstract	Normality			Normal
ortho-06	orth-06, ortho-06	Straight in form.	e.g. orthoconic, orthodentin, orthognathous	Colours, shapes, and textures	Shapes			Linear
ortho-07	orth-07, ortho-07	(crystallography) Orthohrombic crystal structure.	e.g. orthochrysotile, orthopyroxene, orthohexagonal	Colours, shapes, and textures	Shapes			Boxy
ortho-08	orth-08, ortho-08	(organic chemistry) In isomeric benzene derivatives, having the two substituents in adjacent (1,2) positions (compare meta- and para-).	e.g. orthophenylene, orthosubstitution, orthocleavage	Abstract	Spatial
ortho-09	orth-09, ortho-09	(chemistry) Having an extra proportion of water.	e.g. orthophosphate, orthosilicate, orthoferrite	Chemical substances	Substituents
ortho-10	orth-10, ortho-10	Independent, separate.	e.g. orthogonal, orthopair, orthogonal	Abstract	Influences
ortho-11	orth-11, ortho-11	Original, primary.	e.g. orthonasal	Abstract	Temporal
ortho-12	orth-12, ortho-12	Parallel lines or columns.	e.g. orthostyle, ortholinear, orthographic	Colours, shapes, and textures	Shapes			Branching
ortho-13	orth-13, ortho-13	(physics) Of any molecule of the form X2 in which the two nuclei have parallel spin.	e.g. orthopositronium, orthohelium, orthoquarkonium	Physical properties	Other physical properties
ortho-14	orth-14, ortho-14	(medicine) Orthopaedics.	e.g. orthogeriatrics, orthosurgeon, orthoroentgenography	Academic disciplines	Health sciences
ortho-15	orth-15, ortho-15	Vertical or upright in movement.	e.g. orthotropic, orthostasis, orthograde	Abstract	Spatial
ortho-16	orth-16, ortho-16	(geology) Igneous.	e.g. orthogneiss, paragneiss, orthocumulate	Chemical substances	Materials
ortho-17	orth-17, ortho-17	Pure.	e.g. orthoquartzite	Abstract: Correctness	Correctness	Purity		= Pure
oscheo-	oscheo-	The scrotum.		Body parts	Anatomical regions
Osco-	Osco-	Oscan.		Proper nouns	Historical countries
osmio-	osmio-	(chemistry) Osmium.		Chemical substances	Elements
osmo-	osmo-	Osmosis.		Body processes	Cellular processes
osphresio-	osphresio-	Olfaction, to smell.		Body processes	Sensory
ossiculo-	ossiculo-	Ossicule.		Body parts	Bones
osteo-	osse-, osseo-, ossi-, ost-, oste-, osteo-	Bone, bones.	example(s) from: w:peripheral ossifying fibroma, osseous	Body parts	Bones
ostreo-	ostreo-	Forms terms related to oysters.		Lifeforms	Animals
other-	other-	Different, other, alternative.		Abstract	Similarity			! Different
oto-	ot-, oto-	Ear.	example(s) from: otology	Body parts	Organs
Oto-	Oto-	Otomi.		Proper nouns	Historical countries
out-1	out-1	External to, on the outside of.	e.g. outback, outhouse	Abstract	Spatial			Outside
out-2	out-2	Toward the outside of, away from.	e.g. outcast, outlead, outflee	Abstract	Spatial			Outward
out-5	out-5	Beyond. (synonyms: trans-, para-, preter-).	e.g. outgrew	Abstract	Transcendence
out-6	out-6	Completely.	e.g. outfit, outwork	Abstract	Completion
ovario-	ovari-, ovario-	Ovaries.	example(s) from: ovariectomy	Body parts	Organs
over-1	over-1	Above, higher.	e.g. overbar, overlook	Abstract	Spatial			Above
over-2	over-2	Superior.	e.g. overlord	Abstract	Ranking
over-3	over-3	Excessive, excessively.	e.g. overkind, overloud, overstate	Abstract: Quantity	Quantity	Amount		>> Too much
over-4	over-4	Surrounding or covering.	e.g. overcoat, overpaint	Abstract	Covering
over-5	over-5	Augmentative: exceptional; extremely or intensely.	example(s) from: overreact, overact, overbearing	Abstract	Normality			Augmentative
ovo-	ov-, ovi-, ovo-, ovulo-	Egg. ovum.	example(s) from: ovogenesis	Body parts	Gametes
oxa-	oxa-	(chemistry) Used to name compounds in which a carbon atom (typically a methylene group) has been replaced by one of oxygen.		Chemical substances	Substituents
oxalo-	oxal-, oxalo-	(chemistry) Derived from, or related to oxalic acid. Containing the radical -CO-COOH derived from oxalic acid by removal of a hydroxyl.		Chemical substances	Derivatives
oxaza-	oxaza-	(chemistry) Used to name compounds in which two carbon atoms have been replaced by one of oxygen and one of nitrogen.		Chemical substances	Substituents
oxo-1	ox-1, oxi-, oxo-1, oxy-2	Oxygen.	e.g. oxophilic, oxofluoride, oxygenated	Chemical substances	Elements
oxo-2	ox-2, oxo-2	(chemistry) Having a methylene group replaced by a carbonyl group.	example(s) from:	Chemical substances	Substituents
oxy-1	oxy-1	Sharp, keen, pointed, acute.	e.g. oxygon, oxymoron	Colours, shapes, and textures	Textures			Sharp
oxysm-	oxysm-, oxysmo-	Sudden.	e.g. paroxysm	Abstract	Temporal			Temporary

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References

Prefixes that start with P.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
pachy-	pachy-	Thick.	example(s) from: pachyderma, pachyderm	Abstract	Size			Thick
Pako-	Pak-, Pako-	Relating to Pakistani, Pakistan.		Proper nouns	Extant countries
palato-	palat-, palato-	Palate, roof of mouth.		Body parts	Anatomical regions
paleo-	palae-, palaeo-, pale-, paleo-, palæ-, palæo-	Very old, prehistoric, ancient. very early, primitive, archaic.	example(s) from: paleolithic	Abstract	Temporal			2 - Old
palin-	pali-, palin-	Again, repeated, recur.		Abstract	Temporal			Repeat
pallado-	palladio-, pallado-	(chemistry) Palladium.		Chemical substances	Elements
palliato-	palliato-	To relieve, soothe. Palliative.		Human activities	Healing
palpebro-	palpebr-, palpebro-	Eyelid.	example(s) from: palpebra	Body parts	Integument
palpiot-	palpit-, palpito-	Flutter, throb.		Abstract	Motion
palpo-	palp-, palpo-	To gently touch.		Abstract	Influences			Touch
palyno-	palyno-	Pollen; palynology.		Body parts	Gametes
pan-01	pan-01, pano-01	All, referring to all, of all.	e.g. panenteroviral, Panhellenic, panneural, panphilia	Abstract	Scope
pan-02	pan-02, pano-02	Every member of a countable set.	e.g. pancarditis, panophthalmitis, panplegia	Abstract	Completion
pan-03	pan-03, pano-03	Most, nearly all, effectively all in quantity.	e.g. panallergenic, panbacterial, panhypopituitarism	Abstract: Quantity	Quantity, relative	Proportion		>+ Most
pan-04	pan-04, pano-04	Encompassing, including all, or involving all.	e.g. pancaspase, pangender, panlingual	Abstract	Composition
pan-05	pan-05, pano-05	Entire, whole, the entirety of the suffixed object or category.	e.g. pancolonoscopy, pangastritis, pangenomic	Abstract	Spatial
pan-06	pan-06, pano-06	Universal, everything, all that can be imagined.	e.g. pangeometry, panphobia, theopanism	Abstract	Influences
pan-07	pan-07, pano-07	Unification of a social group, the political movement to unify said group.	e.g. Pan-Africanism, pan-Indianism, pan-nationalism	Social facts	Political and social movements
pan-08	pan-08, pano-08	Spanning the entirety of a set which may not be countable, its members may not be clearly distinguished from each other.	e.g. pancontinental, pan-Covid, pancultural	Abstract	Size
pan-09	pan-09, pano-09	Throughout an area indicated by the suffix.	e.g. panarctic, pancolitis, panfandom	Abstract	Spatial
pan-10	pan-10, pano-10	Representing or covering a given social group.	e.g. Pan-Asian, pan-Palestinian, Pan-Anglican	Abstract	Influences
pan-11	pan-11, pano-11	Ubiquitous, widespread. The suffix indicates what is widespread rather than the area in which it is widespread.	e.g. panallergen, pannecrosis	Abstract	Normality
pan-12	pan-12, pano-12	(LGBTQ) Pansexual or pansexuality.	e.g. pancurious, panphobia	Social facts	Political and social movements
pancreato-	pancreat-, pancreatico-, pancreato-	Pancreas.		Body parts	Organs
panto-	pant-, panta-, panto-	Indicating the whole, entirety.		Abstract	Composition			Whole
papa-	papa-	Of or pertaining to the pope or the papacy.		Social facts	Social institutions
papillo-	papill-, papillo-	Papilla, nipple.	example(s) from: papillitis	Body parts	Orifices
papulo-	papul-, papulo-	Papule.	example(s) from: papulation	Body processes	Pathological
Papuo-	Papuo-	Papua, Papuan.		Proper nouns	Languages
papyro-	papyro-	Papyrus. Also used for paperwork.		Technologies	Communication technologies
para-01	par-01, para-01	Beside, alongside.	e.g. parasite, parallel, paracapsular	Abstract	Spatial			Beside
para-02	par-02, para-02	Parallel.	e.g. paraconformity, paraxial	Abstract	Angles			Parallel
para-03	par-03, para-03	Between.	e.g. paracellular, paraconule, paradiploid	Abstract	Spatial			Between
para-04	par-04, para-04	Around, surrounding.	e.g. paracortex, paradiapophysis	Abstract	Spatial			Surrounding
para-05	par-05, para-05	Covering.	e.g. paracolpitis	Abstract	Covering
para-06	par-06, para-06	Adjacent, next to.	e.g. paracentral, paracaval	Abstract	Routing
para-07	par-07, para-07	Near.	e.g. paranal, parepididymis, parethmoid	Abstract	Spatial			Near
para-08	par-08, para-08	On the opposite side of.	e.g. paracavernous	Abstract	Spatial			Opposite
para-09	par-09, para-09	Above, over.	e.g. paraductal, paracoronoid, paracondylar	Abstract	Spatial			Above
para-10	par-10, para-10	Across, through, throughout.	e.g. paracotylar, paraesophageal, paracloacal, paracostal	Abstract	Spatial			Across
para-11	par-11, para-11	Beyond.	e.g. paradox, paranormal, paraclival	Abstract	Transcendence
para-12	par-12, para-12	Abnormal.	e.g. paralgesia	Abstract	Normality			Abnormal
para-13	par-13, para-13	Incorrect, false.	e.g. paradiorthosis	Abstract: Correctness	Correctness	Truth		! False
para-14	par-14, para-14	Resembling.	e.g. paramilitary, paramylum	Abstract	Similarity			= Similar
para-15	par-15, para-15	Unrecognized, unauthorized, or unsanctioned.	e.g. parastate, parabaptism	Abstract: Correctness	Correctness	Goodness		! Bad
para-16	par-16, para-16	Avoiding or avoidant.	e.g. parenteral, paraconsistent	Abstract	Routing
para-17	par-17, para-17	(chemistry) In isomeric benzene derivatives, having the two substituents in opposite (1,4) positions.		Abstract	Spatial			Opposite
para-18	par-18, para-18	Affecting or concerning the lower body.	e.g. paranesthesia, paraballism	Body parts	Anatomical regions
parasito-	parasito-	Parasite.		Body processes	Pathological
pari-1	pari-1	Equal.	e.g. parity	Abstract	Similarity			= Equal
pari-2	pari-2	(anatomy) Even in quantity.	e.g. paridigitate, paripinnate	Abstract: Quantity	Parity	Even		0
parieto-	parieto-	Pareital bone.		Body parts	Bones
parthen-	parthen-, partheno-	Parthenogenesis, without fertilization.		Body processes	Reproduction
parvo-	parvo-	Small.	example(s) from: w:Parvovirus	Abstract	Size			Small
patello-	patello-	Patella.		Body parts	Bones
pater-	pater-	Father, patriarch.		Life stages	Life cycle
patho-	path-, patho-	Disease, pathology.	example(s) from: w:Pathology	Body processes	Pathological
patro-	patr-, patri-	Father, fatherhood.		Life stages	Life cycle
pauci-	pauci-	(biology) Having or involving few.	e.g. paucisymptomatic, paucispiral	Abstract: Quantity	Quantity	Amount		< Not much
pebi-	pebi-	250.		Abstract: Quantity	Numbers	Factors		250
pectoro-	pector-, pectoro-	Chest.	example(s) from: pectoralgia, pectoriloquy, pectorophony	Body parts	Anatomical regions
pedi-	ped-, pedi-	Foot, feet.	e.g. pedal, pedestrian	Body parts	Anatomical regions
pedo-1	paedo-1', pedo-1', pædo-1'	Feet.		Body parts	Anatomical regions
pedo-3	paedo-3', pedo-3', pædo-3'	Children.		Life stages	Life cycle
peg-	peg-	(biochemistry) Used to form names of PEGylated molecules.		Chemical substances	Forms
peloro-	peloro-	(taxonomy) A morpheme term pertaining to monsters, in the popular sense of "something huge".		Abstract	Size			Big
pelvi-	pelv-, pelvi-, pelvo-	Pelvis.	e.g. pelviureteric, pelviperineal, pelviperitonitis	Body parts	Anatomical regions
pend-	pend-	To hang down.		Abstract	Spatial			Down
pene-	pen-, pene-	Almost.	e.g. peninsula, penultimate, penumbra	Abstract	Similarity
peno-	peno-	(anatomy) Penis.		Body parts	Organs
penta-	pent-, penta-, pentakis-, penti-	Five.		Abstract: Quantity	Numbers	Cardinal		5
pentadeca-	pentadeca-	Fifteen.		Abstract: Quantity	Numbers	Cardinal		15
pentaprismo-	pentaprismo-	(chemistry) Compounds having ten atoms bound into a pentagonal prism.		Colours, shapes, and textures	Shapes			Boxy
peo-	peo-	(medicine) Penis.	example(s) from: w:Peotomy	Body parts	Organs
per-1	per-1	(non-productive) In verbs: denoting the sense "through".	e.g. perforate	Abstract	Spatial
per-2	per-2	(non-productive) In verbs: denoting the sense "thoroughly".	e.g. perfect	Abstract	Completion
per-3	per-3	(non-productive) In verbs: denoting the sense "to destruction".	e.g. pervert	Abstract	Composition			Un-joining
per-4	per-4	(non-productive) In adjectives and adverbs: denoting the sense "extremely".	e.g. perfervid	Abstract	Normality			Intensifying
per-5	per-5	(chemistry) Forming nouns and adjectives denoting the maximum proportion of one element in a compound.	e.g. peroxide	Abstract: Quantity	Quantity, relative	Proportion		Maximum
per-6	per-6	(chemistry) Added to the name of an element in a polyatomic ion to denote the number of atoms of that element (usually four).		Abstract	Chemical structures
per-7	per-7	(non-productive) Denoting the sense "by" or par from French.	e.g. perchance, perhaps	Abstract	Influences
perfluoro-	perfluoro-	(chemistry) Used to describe any compound or group in which every hydrogen atom has been replaced by fluorine.		Chemical substances	Substituents
peri-1	peri-1	around or surrounding.	e.g. perimeter, meter	Abstract	Spatial
peri-2	peri-2	near.	e.g. perihelion, helion	Abstract	Spatial
peri-3	peri-3	during.	e.g. peri-apocalyptic, apocalyptic, perinatal, natal	Abstract	Temporal
perineo-	perineo-, peritone-	Perineum.		Body parts	Anatomical regions
perma-	perma-	Permanent.		Abstract	Temporal			Permanent
pero-	pero-	Congenital absence of a body part.		Body processes	Pathological
perone-	perone-	Fibula.		Body parts	Bones
peroxy-	peroxy-	(chemistry) Used to name compounds containing the divalent peroxy -O-O- radical.		Chemical substances	Radicals
Perso-	Perso-	Persia, Persian, Iran, Iranian.	e.g. Persophone	Proper nouns	Extant countries
peta-	peta-	(United States of America) quadrillion, 1015. (Great Britain) septillion, 1024.		Abstract: Quantity	Numbers	Factors		1015
petro-	petro-	Rocks. Petrol, fossil fuels.		Chemical substances	Materials
phaco-	phaco-, phako-	Lens.	example(s) from: phacolysis, phacometer, phacoscotoma	Colours, shapes, and textures	Shapes			Yonic
phago-	phagist-, phago-	Eating, feeding, consuming.	e.g. phagocytosis, phagophobia, phagokinesis	Body processes	Bodily needs and functions
phallo-	phall-, phallo-	Penis.	example(s) from: w:Aphallia	Body parts	Organs
phanero-	phanero-	Visible.		Colours, shapes, and textures	Colours	Shades		! - Visible
pharmaco-	pharma-, pharmac-, pharmaco-	Pertaining to pharmaceuticals or pharmacology.	e.g. pharmacokinetic, pharmacoenhancer	Academic disciplines	Health sciences
pharyngo-	pharyng-, pharyngo-	Pharynx.	example(s) from: pharyngitis, pharyngoscopy	Body parts	Tubes and ducts
pheno-1	phaeno-, phen-1, pheno-1, phæno-	Displaying, showing.		Abstract	Covering
pheno-2	phen-2, pheno-1	Benzene.		Chemical substances	Functional groups
pheo-	phaeo-, pheo-	Grey or dark in colour.		Colours, shapes, and textures	Colours	Shades		3 - Dark
phil-	phil-, philo-	Liking, loving.	e.g. philathletic, phillumeny, philhippic	Body processes	Emotion
phimo-	phimo-	Muzzle.		Body parts	Anatomical regions
phlebo-	phleb-, phlebo-	Veins.	example(s) from: phlebography, phlebotomy	Body parts	Tubes and ducts
phob-	phob-, phobo-	Fear.		Body processes	Emotion
Phoenico-	Phoenico-	Phoenicia.		Proper nouns	Historical countries
phono-	phon-, phono-	Sound.	example(s) from: phonograph, symphony	Body processes	Sensory
phos-	phos-	(medicine) Light and its chemical properties.	example(s) from: phosphene	Physical properties	Other physical properties
phospha-	phospha-	(chemistry) Indicating that phosphorus substitutes for another atom in the molecule name it prefixes.		Chemical substances	Substituents
phospho-	phosph-, phospho-, phosphoro-	Phosphorous.		Chemical substances	Elements
photo-	phot-, photo-	Light, electromagnetic radiation, radiant energy. photograph.	example(s) from: photoelectric, photography, photosynthesis	Physical properties	Other physical properties
phragmo-	phragmo-	Divided due to obstruction or barrier.		Abstract	Composition			Un-joining
phreno-1	phren-1, phreni-1, phrenic-1, phrenico-1, phreno-1	Mind.	e.g. phrenology, aphrenia, phrenopathy	Body parts	Brain
phreno-2	phren-2, phreni-2, phrenic-2, phrenico-2, phreno-2	Diaphragm.	e.g. phrenocostal, phrenoplegia, phrenospasm	Body parts	Muscles
Phrygio-	Phrygio-	Relating to Phrygia, the Phrygians or the Phrygian language.		Proper nouns	Historical countries
phyco-	phyco-	Seaweeds, algae.		Lifeforms	Plants
phyllo-	phyllo-	Leaves.	example(s) from: w:phyllodes tumour, phyllotaxis	Body parts	Organs
phylo-	phylo-	Group, grouping.		Abstract	Composition
physi-	phys-, physi-	Nature; physical.		Academic disciplines	Natural
physico-	physico-	Physical, physics.		Academic disciplines	Natural
physio-	physio-	Nature, natural, physical. Physiology, physiotherapy.		Academic disciplines	Natural
physo-	physo-	Air, gas, particularly in an organism (e.g. air sac).	e.g. physograde, physogastry, physometra	Body parts	Bodily fluids
phyto-	phyto-	Plants.		Lifeforms	Plants
pico-	pico-	10-12.		Abstract: Quantity	Numbers	Factors		10-12
picro-	picro-	Bitter.		Physical properties	Tasteable properties
pict-	pict-	Paint, draw, visualize, show.	e.g. pictograph, pictorial	Human activities	Language
Picto-	Picto-	A combining form relating to Pictland (prehistoric northern and eastern Scotland) or Pictish people (Picts).		Proper nouns	Historical countries
piezo-	piezo-	Pressure.		Abstract	Mass
pilo-	pilo-	Hair.		Body parts	Integument
pimelo-	pimelo-	Fatty.		Physical properties	Tasteable properties
pinealo-	pineal-, pinealo-	Pineal gland.		Body parts	Brain
pinni-1	pinni-1	Wings.		Body parts	Anatomical regions
pinni-2	pinni-2	Feathers.		Body parts	Integument
piri-	piri-	Pear-shaped.	example(s) from: w:Piriformis muscle	Colours, shapes, and textures	Shapes			Round
Pisano-	Pisano-	Pisa.		Proper nouns	Historical countries
pisci-	pisci-	Fish.		Lifeforms	Animals
pitheco-	pitheco-	Ape.		Lifeforms	Animals
pituitaro-	pituitaro-	Pituitary gland.		Body parts	Brain
placento-	placento-	Placenta.		Body parts	Organs
placo-	placo-	Plate-shaped. Typically used for scales of animal skins.	e.g. Placodermi, Placodontia	Colours, shapes, and textures	Shapes			Bumpy
plagio-	plagio-	Oblique angle.		Abstract	Angles			Oblique
planeto-	planeto-	Used to form astronomical terms related to planets.		Celestial bodies and their rotations	General
plani-	plani-, plano-	Level, flat.		Abstract	Angles			Straight
planto-	planto-	Sole of the foot.		Body parts	Anatomical regions
plas-	plas-, plaso-	Formation, development, structure.		Abstract	Basis
plasmo-	plasmo-	Plasma.		Physical properties	States of matter
plasto-1	plasto-1	Plastid.		Body parts	Cellular
plasto-2	plasto-2	Plastic.		Chemical substances	Materials
platini-	platini-, platino-	(chemistry) Platinic, Platinum.		Chemical substances	Elements
platinoso-	platinoso-	(chemistry) Platinous.		Chemical substances	Elements
platy-	platy-	Level, flat.		Abstract	Angles			Straight
pleo-	pleio-, pleo-	More.	example(s) from: pleonasm, pleroma	Abstract: Quantity	Quantity, relative	Inequality		> More
plesio-	plesio-	Close, near.		Abstract	Spatial			Near
pleuro-1	pleur-1, pleuro-1	(anatomy) The pleurae.	e.g. pleurogenic, pleuropericarditis	Body parts	Membranes
pleuro-2	pleur-2, pleuro-2	To the side, lateral.	e.g. pleurocentrum, pleurocoel	Abstract	Spatial			Side
plumbo-	plumb-, plumbo-	Lead.		Chemical substances	Elements
pluri-	pluri-	Several.		Abstract: Quantity	Quantity	Amount		> Much
plusquam-	plusquam-	(chiefly forming nonce words) more than; beyond (in degree).		Abstract: Quantity	Quantity, relative	Inequality		> More
pluto-1	pluto-1	Wealth or money.		Social facts	Social institutions
pluto-2	pluto-2	Plutonium.		Chemical substances	Elements
pluvio-	pluvio-	Rain; rainfall.		Weather and natural disasters	Weather
pneumato-	pne-2, pneum-2, pneumat-, pneumato-, pneumo-2, pneumon-2, pneumono-2	Air; gas.	e.g. pneumatic, pneumotactile, pneumatometer, pneumothorax	Physical properties	States of matter
pneumo-1	pne-1, pneum-1, pneumo-1, pneumon-1, pneumono-1	Lungs.	example(s) from: apnea, pneumatology, pneumonocyte, pneumonia	Body parts	Organs
podo-	pod-, podo-	Feet.	example(s) from: podiatrist	Body parts	Anatomical regions
pogono-	pogono-	Beard.		Body parts	Integument
poikilo-1	poecilo-1, poikilo-1, pœcilo-1	Variable.	e.g. poikilocapnic, poikilochlorophyllous, poikilothermic	Abstract	Similarity			! Variety
poikilo-2	poecilo-2, poikilo-2, pœcilo-2	Variegated.	e.g. poikiloblast, poikiloderma, poecilosclerid	Colours, shapes, and textures	Colours	Hues
Poké-	Poké-	Pertaining to the Pokémon media franchise.		Proper nouns	Popular culture
pol-	pol-	Polonium.	e.g. polane, polonide	Chemical substances	Elements
polio-1	poli-1, polio-1	Grey.	example(s) from: poliomyelitis	Colours, shapes, and textures	Colours	Shades		2 - Grey
polio-2	poli-2, polio-2	Grey matter of the nervous system.	example(s) from: poliomyelitis	Body parts	Organ systems
politico-	politico-	Political, politics, political science.		Academic disciplines	Societal
Polono-	Polono-	Polish. of or pertaining to Poland.	e.g. Polonophone	Proper nouns	Extant countries
poly-1	poly-1	many.	e.g. polydactyl, polyglot, polyvalent	Abstract: Quantity	Quantity	Amount		> Much
poly-2	poly-2	polymer.	e.g. polyacetal, polyethene, polyether	Chemical substances	Forms
poly-3	poly-3	polyamory.	e.g. polycule, polyphobia, polyfamily	Abstract	Social facts			Social and political movements
polydeoxy-	polydeoxy-	Various polymers of deoxynucleotides and their derivatives.		Chemical substances	Derivatives
polydeoxyribo-	polydeoxyribo-	Used to form various polymers of deoxyribonucleotides and their derivatives.		Chemical substances	Derivatives
polymorpho-	polymorpho-	(medicine) Polymorphous.		Abstract	Similarity
polypo-	polypo-	Polyp.		Body processes	Pathological
polyribo-	polyribo-	Forming the names of polyribonucleotides and derived words.		Chemical substances	Derivatives
porn-	porn-, porno-	Pornography.		Human activities	Types of media
poro-	por-, poro-	Pores.	e.g. porocalyx, porotaxy, poroscopy	Body parts	Cavities
porphyr-	porphyr-	Purple.	example(s) from: porphyroblast	Colours, shapes, and textures	Colours	Hues		9 - Purple
porta-	porta-	Portable, movable.		Abstract	Motion
porto-	porto-	Portal vein.		Body parts	Tubes and ducts
poseido-	poseido-	Neptune.		Celestial bodies and their rotations	Solar system
posito-	posito-	Placement, arrangement, positioning.		Abstract	Basis
post-1	post-1	after, later.	example(s) from: postfix, postpone, postscript	Abstract	Temporal
post-2	post-2	(anatomy) behind.		Abstract	Spatial
postero-	posterio-, postero-	The posterior; opposite of anterior.		Abstract	Spatial
potamo-	potam-, potamo-	River.		Landforms and ecosystems	Landforms
potassio-	potassio-	Potassium.		Chemical substances	Elements
praseo-	praseo-	Green.		Colours, shapes, and textures	Colours	Hues		4 - Green
pre-1	prae-1, pre-1, præ-1	Before; physically in front of; (anatomy) anterior.	example(s) from: prefix	Abstract	Spatial
pre-2	prae-2, pre-2, præ-2	Before; earlier in time; beforehand.	example(s) from: predict, prepare, preview, preschool, prewrite	Abstract	Temporal
pred-	pred-	(pharmacology) Prednisolone.		Chemical substances	Pharmacological
prepro-	prepo-, prepro-	Denoting a precursor.		Abstract	Temporal
presby-	presby-, presbyo-	Elder, old.	example(s) from: presbyopia, presbycusis	Abstract	Temporal			2 - Old
preter-	praeter-, preter-, præter-	Exceeding, beyond expectations.	e.g. preterlegal, preternature, preternormal	Abstract	Transcendence
prim-1	prim-1, prime-1	First, earliest.	example(s) from: primary	Abstract	Temporal
prim-2	prim-2, prime-2	Foremost, chief, principal, prime, eminent.	e.g. primly	Abstract	Ranking
pristanoyl-	pristanoyl-	(chemistry) Pristanic acid.		Chemical substances	Acids
pro-1	pro-1	agreeing with; supporting; favouring.	e.g. pro-choice, prodifferentiation, probiotic	Abstract	Polarity			Support
pro-2	pro-2	substituting for.		Abstract	Influences			Transferal
pro-3	pro-3	Forward movement.	e.g. procede, propel, progress	Abstract	Spatial
pro-4	pro-4	earlier; prior.		Abstract	Temporal
pro-5	pro-5	rudimentary.		Abstract	Complexity
pro-6	pro-6	in front of.		Abstract	Spatial
procto-	proct-, procto-	Rectum.	example(s) from: proctology	Body parts	Intestines
prop-	prop-	(chemistry) Three carbon atoms.		Chemical substances	Forms
proso-	pros-, proso-	Towards, forward.	e.g. prosthesis, prostrate, prose	Abstract	Spatial			Forward
prosopo-	prosop-, prosopo-	The face.	example(s) from: prosopagnosia	Body parts	Anatomical regions
proteo-	proteo-	Protein.		Chemical substances	Biochemistry
protero-	protero-	First, earliest, early.		Abstract	Temporal			0 - First
proto-1	prot-1, proto-1	Primitive, early, undeveloped.	e.g. protophysics, protometal, protoword	Abstract	Completion
proto-2	prot-2, proto-2	Original, older.	e.g. protograph, protolacteal, prototype, protoplasm	Abstract	Temporal
proto-3	prot-3, proto-3	First in order.	e.g. protogynous, protandrous	Abstract: Quantity	Numbers	Ordinal		1
proto-4	prot-4, proto-4	Primary.	e.g. protoderm, protocneme	Abstract	Ranking
proto-5	prot-5, proto-5	(linguistics) Most recent common ancestor (often hypothetical) of.	e.g. Proto-Indo-European, Proto-Germanic	Abstract	Parenthood
proto-6	prot-6, proto-6	(chemistry) A minimal proportion of a particular substance when in a combination.	e.g. protoxide, protosulfide, protiodide	Abstract: Quantity	Quantity, relative	Proportion		. Minimal
proto-7	prot-7, proto-7	(chemistry) Relating to protons and/or positive charge.	e.g. protophilic, protolysis	Particles	Particles
proto-8	prot-8, proto-8	(anatomy) Anterior.	e.g. prototroch, protoconid, protoconule	Abstract	Spatial
Provenço-	Provenço-	Provence, Provençal.		Proper nouns	Languages
proximo-	proxi-, proxim-, proximo-	Nearby, close to.		Abstract	Spatial			Near
prurito-	prurito-	Itching.		Body processes	Pathological
Prusso-	Prusso-	Prussia, Prussian.		Proper nouns	Historical countries
pseph-	pseph-, psepho-	Pebble, stone. Voting, election, ballot box.		Social facts	Social institutions
pseudo-1	pseud-1, pseudo-1	Not true, but appears like it is true.	e.g. pseudoallergy, pseudoallelism, pseudobenevolent	Abstract: Correctness	Correctness	Truth		! False
pseudo-2	pseud-2, pseudo-2	Substitute, simulation.	e.g. pseudoangle, pseudarthrosis; example(s) from: pseudonym	Abstract	Composition			Substitution
psilo-	psilo-	Bare, smooth.		Colours, shapes, and textures	Textures			1 - Smooth
psor-	psor-	(medicine) Itching.	example(s) from: psoriasis	Body processes	Pathological
psycho-	psych-, psycho-	Mind, brain, psychology.	e.g. psychostimulant, psychoacoustics, psychosocial	Academic disciplines	Health sciences
psychoto-	psychoto-	Psychosis.		Body processes	Pathological
psychro-1	psychro-1	The perception of cold.	e.g. psychrophobia, psychrotolerance, psychrotherapy	Body processes	Sensory
psychro-2	psychro-2	Cold.	e.g. psychroplanet, psychroxerophytic, psychrometer	Physical properties	Climactic conditions
pterido-	pterid-, pterido-	Ferns.		Lifeforms	Plants
ptero-1	pter-1, ptero-1, ptery-1	Wing.	e.g. Pterosaur, pterophorid, pterochorous	Body parts	Anatomical regions
ptero-2	pter-2, ptero-2, ptery-2	Feather.	e.g. pterography, pterophyte	Body parts	Integument
ptero-3	pter-3, ptero-3, ptery-3	Wing-like.	example(s) from: w:lateral pterygoid plate3	Colours, shapes, and textures	Shapes			Branching
pterygo-1	pteryg-1, pterygo-1	Relating to the wing, or fin.	e.g. pterygoblast, pterygobranchiate	Body parts	Anatomical regions
pterygo-2	pteryg-2, pterygo-2	Wing-shaped.		Colours, shapes, and textures	Shapes			Branching
pterygo-3	pteryg-3, pterygo-3	Pterygoid. Of, pertaining to or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull.	e.g. pterygomalar	Body parts	Bones
ptilo-1	ptilo-1	Feather, down.		Body parts	Integument
ptilo-2	ptilo-2	Feather-shaped.	e.g. ptilolite	Colours, shapes, and textures	Shapes			Branching
ptyalo-	ptyalo-	Saliva.		Body parts	Bodily fluids
pubo-	pubo-	Pubis.		Body parts	Bones
pulmo-	pulmo-, pulmon-, pulmono-	Lungs.	example(s) from: pulmonary	Body parts	Organs
puls-	puls-, pulsato-, pulso-	To beat, to pulse.		Abstract	Motion
punct-	punct-	Puncturing, pricking points.	e.g. punctiform, pyropuncture, acupuncture	Body processes	Pathological
Punico-	Punico-	Carthage.		Proper nouns	Historical countries
pur-1	pur-1	Forwards, movement.	e.g. pursue, purport	Abstract	Spatial			Forward
pur-2	pur-2	Completion or completeness.	e.g. purchase, purblind	Abstract	Completion
purpureo-	purpureo-	Purple.		Colours, shapes, and textures	Colours	Hues		9 - Purple
pycno-	pycno-, pykno-	Dense, compact.	example(s) from: pyknosis	Abstract	Mass
pyelo-	pyel-, pyelo-	(anatomy) Renal pelvis.	example(s) from: pyelonephritis	Body parts	Tubes and ducts
pygo-	pygo-	Buttocks.		Body parts	Anatomical regions
pyloro-	pylor-, pyloro-	Pylorus. Gate.	example(s) from: w:pyloric sphincter	Body parts	Orifices
pyo-	py-, pyo-	Pus.	example(s) from: pyometra	Body processes	Pathological
pyreto-	pyr-2, pyreto-, pyrexo-, pyro-2	Fever.	e.g. pyrotherapy, pyrogen	Body processes	Pathological
pyro-1	pyr-1, pyro-1	Fire, heat.	example(s) from: pyrokinetic, pyrotechnic	Physical properties	Climactic conditions
pyro-3	pyr-3, pyro-3	(chemistry) Orthoacid.	e.g. pyrocarbonate	Chemical substances	Acids
pyrrh-	pyrrh-	Red.		Colours, shapes, and textures	Colours	Hues		1 - Red
pyrrolidino-	pyrrolidino-	(chemistry) Containing a pyrrolidine ring.		Chemical substances	Radicals

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Prefixes that start with Q.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
qu-	qu-	Quantum computing.		Technologies	Types of technologies
quad-	quad-	Involving four elements.		Abstract: Quantity	Numbers	Cardinal		4
quadri-	quadr-, quadri-, quadro-, quadru-	Four.	example(s) from: quadrilateral, quadrinomial	Abstract: Quantity	Numbers	Cardinal		4
qual-	qual-	Quality.		Abstract	Basis
quant-	quant-	Quantity.		Abstract	Basis
quarter-1	quarter-1	Fourth part.		Abstract: Quantity	Numbers	Ordinal		4
quarter-2	quarter-2	1/4.		Abstract: Quantity	Numbers	Cardinal		0.25
quarter-3	quarter-3	Three-month term.		Celestial bodies and their rotations	Time periods
quasi-	quasi-	Like, similar.	example(s) from: quasi-religious	Abstract	Similarity			= Similar
quecto-	quecto-	10-30.		Abstract: Quantity	Numbers	Factors		10-30
quer-	quer-, ques-	Seek, ask.		Abstract	Intention			Intention
quetta-	quecca-, quetta-	1030.		Abstract: Quantity	Numbers	Factors		1030
quin-	quin-, quinqu-, quinque-	Five.		Abstract: Quantity	Numbers	Cardinal		5
Qurano-	Qurano-	The Quran.		Proper nouns	Religions/philosophies

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Prefixes that start with R.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
race-	rac-, race-	(chemistry) Denoting a racemic mix or racemate of enantiomers; equal quantities of.		Abstract	Proportions
rachi-	rachi-, rhachi-, rhachio-	The spine.	example(s) from: rachial, rachialgia, rachidian, rachiopathy	Body parts	Bones
racio-	racio-	Study of race/racism.	e.g. raciolinguistics, raciology	Academic disciplines	Societal
radiculo-	radic-, radiculo-	The root of a nerve.	example(s) from: radiculopathy	Body parts	Nerves
radio-1	radi-1, radio-1	Radiation, radioactive.	e.g. radiotherapy, radioactinium, radiolucent	Physical properties	Other physical properties
radio-2	radi-2, radio-2	Radio waves, radio broadcasting.	e.g. radiotelemetry, radioacoustics, radiotelegraph	Technologies	Communication technologies
radio-3	radi-3, radio-3	(anatomy) Radius (bone).	e.g. radiobicipital, radioneuritis	Body parts	Bones
radio-4	radi-4, radio-4	(mathematics) Radius.	e.g. radiosymmetrical	Abstract	Basis
rage-	rage-	(slang) Anger, angering.		Body processes	Emotion
re-1	re-1	Again.	e.g. renew, recommit, reheat	Abstract	Temporal
re-2	re-2	Completion; updated, anew.	example(s) from: reletter, relead, rebronze	Abstract	Completion
re-3	re-3	Back, backward.	e.g. reject, reply, resist	Abstract	Spatial
recti-	recti-	Straight.		Abstract	Angles			Straight
recto-	rect-, recto-	The rectum.	e.g. rectoabdominal, rectosacral, rectophobia	Body parts	Intestines
recto-2	recto-2	In the direction of the rectum.	e.g. rectoabdominal	Abstract	Spatial
regio-	regio-	Region, regional geography.		Abstract	Basis
religio-	religio-	Religion.		Social facts	Social institutions
reno-	ren-, reni-, reno-	The kidneys.		Body parts	Organs
rept-	rept-	Crawl, creep (as a form of locomotion).		Body processes	Bodily needs and functions
respiro-	respiro-	Breathing.		Body processes	Bodily needs and functions
resuscito-	resuscito-	Resuscitation.		Human activities	Healing
reticulo-	reticul-, reticulo-	Reticulated, network, mesh.	example(s) from: reticulocyte	Abstract	Routing
retino-	retino-	The retina.		Body parts	Eyes
retro-	retro-	Backwards, behind.	example(s) from: retrograde	Abstract	Spatial			Backward
rhabdo-	rhabd-, rhabdo-	Rod, rod-like.	example(s) from: rhabdomyolysis	Colours, shapes, and textures	Shapes			Cylindrical
Rhaeto-	Rhaeto-, Rhæto-	Rhaetia; Rhaetian.		Proper nouns	Historical countries
rhamno-	rhamno-	Rhamnose.		Chemical substances	Biochemistry
rheo-	rheo-	Current, flow.		Abstract	Motion
rheumato-	rheumato-	Watery flow.		Body processes	Pathological
rhino-	rhin-, rhino-	The nose.	example(s) from: rhinoceros, rhinoplasty	Body parts	Organs
rhizo-	rhiz-, rhizo-	Roots.		Body parts	Organs
rhod-2	rhod-2	Rhodium.	e.g. rhodate, rhodocene	Chemical substances	Elements
rhodo-	rhod-1, rhodo-	Rosy, reddish pink.	example(s) from: rhodophyte	Colours, shapes, and textures	Colours	Hues		0 - Pink
rhombi-	rhombi-	(geometry) Having four-sided faces.		Colours, shapes, and textures	Shapes			Boxy
rhyncho-	rhyncho-	Beak, snout.		Body parts	Anatomical regions
ribo-	ribo-	Set of 3 CHOH molecules, ribose.		Chemical substances	Forms
rifa-	rifa-	(pharmacology) Used to form names of rifamycin derivatives used as antibiotics.		Chemical substances	Pharmacological
robo-	robo-	Robot.		Technologies	Types of technologies
Romano-1	Romano-1	Romani.		Proper nouns	Languages
Romano-2	Romano-2	Romania, Romanian.		Proper nouns	Extant countries
Romano-3	Romano-3	Rome, Roman.		Proper nouns	Historical countries
ronna-	ronna-	1027.		Abstract: Quantity	Numbers	Factors		1027
ronto-	ronto-	10−27.		Abstract: Quantity	Numbers	Factors		10-27
roseo-	roseo-	Rosy, reddish pink.		Colours, shapes, and textures	Colours	Hues		0 - Pink
rostro-	rostro-	Rostrum; the oral or nasal region of an organism.		Abstract	Spatial
roto-	roto-	Rotation, turn.		Abstract	Motion
Ruando-	Ruando-, Rwando-	Rwanda, Rwandan.	e.g. Rwandophone	Proper nouns	Extant countries
rubid-	rubid-	Rubidium.	e.g. rubidic, rubidide	Chemical substances	Elements
rubr-	rubr-, rubro-	(medicine) The red nucleus of the brain.	example(s) from: rubrospinal	Body parts	Brain
rufo-	rufo-	Reddish.		Colours, shapes, and textures	Colours	Hues		1 - Red
rupt-	rupt-	To break.		Abstract	Composition			Un-joining
Russo-	Russo-	Russian.	e.g. Russophone	Proper nouns	Extant countries
ruthenio-	ruthenio-, rutheno-	Ruthenium.		Chemical substances	Elements
Rutheno-	Rutheno-	Ruthenia.		Proper nouns	Historical countries

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Prefixes that start with S.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
saccharo-	saccharo-	Sugar.		Chemical substances	Biochemistry
sacculo-	sacculo-	(anatomy) Sacculus.	e.g. sacculocochlear, sacculoutricular, sacculolagenar	Body parts	Ears
sacro-	sacr-, sacro-	Sacrum.		Body parts	Bones
sado-	sado-	Sadism, desire to inflict pain.		Human activities	Other human activities
Saharo-	Saharo-	The Sahara.		Proper nouns	Regions
Sahelo-	Sahelo-	The Sahel.		Proper nouns	Regions
saint-	saint-	Saint.		Social facts	Religion & mythology
sal-	sal-	(pharmacology) Salicylic acid.		Chemical substances	Pharmacological
salazo-	salazo-	(pharmacology) Phenylazosalicylic acid.		Chemical substances	Pharmacological
salpingo-	salping-, salpingo-	Fallopian tubes.	example(s) from: salpingectomy, w:salpingopharyngeus muscle	Body parts	Organs
same-	same-	Same, similar.		Abstract	Similarity			= Similar
sangui-	sangui-, sanguine-	Blood.	e.g. sanguivorous, sanguify	Body parts	Bodily fluids
sapo-	sapo-, sapon-	Soap.		Chemical substances	Materials
sapro-	sapr-, sapro-	Putrid, rotten matter.	example(s) from: saprogenic	Body processes	Pathological
sarco-	sarc-, sarco-	Flesh.	example(s) from: sarcoma, sarcoidosis	Body parts	Connective tissues
Sardo-	Sardo-	Sardinia.		Proper nouns	Historical countries
Sarmato-	Sarmato-	Sarmatians.		Proper nouns	Historical countries
sauro-	sauro-	Lizard.		Lifeforms	Animals
Saxo-	Saxo-	Saxons, Saxony.		Proper nouns	Historical countries
scandio-	scandio-, scando-	Scandium.	e.g. scandiobabingtonite, scandocene	Chemical substances	Elements
Scando-	Scando-	Pertaining to Scandinavia.		Proper nouns	Regions
scapho-	scapho-	Shaped like a boat.		Colours, shapes, and textures	Shapes			Yonic
scapulo-	scapul-, scapula-, scapulo-	(anatomy) Scapula.	example(s) from: scapulothoracic, w:facioscapulohumeral muscular dystrophy	Body parts	Bones
scato-	scato-	Excrement, feces.	e.g. scatophagy	Body processes	Bodily needs and functions
sch-	sch-, sh-	Used to intensify a word, especially for comedic effect.		Abstract	Intensity
schisto-2	schist-2, schisto-2	(geology) Schist, shale.	e.g. schistous, schistaceous	Chemical substances	Materials
schizo-1	schist-1, schisto-1, schiz-1 , schizo-1	Split, cleft, splittable.	e.g.schizodactyly, schizogony, schizoid, schizophasia	Abstract	Composition			Un-joining
schizo-2	schiz-2 , schizo-2	Schizophrenia.	e.g. schizoaffective, schizosexual	Body processes	Pathological
schm-	schm-, shm-	Used to intensify a word, especially for comedic effect.		Abstract	Intensity
scientifico-	scientifico-	Science; scientific.		Academic disciplines	Natural
scint-	scint-, scinti-	Scintillating.		Physical properties	Other physical properties
sclero-1	scirrho-, scler-1, sclero-1	Hard.	e.g. scleroatrophy, sclerous, sclerosponge	Colours, shapes, and textures	Textures			4 - Hard
sclero-2	scler-2, sclero-2	(anatomy) Sclera.	e.g. scleroplasty, scleromalacia	Body parts	Eyes
scolio-	scoli-, scolio-	Crooked, bent.	example(s) from: scoliosis	Abstract	Angles			Bent
scopol-	scopol-	(pharmacology) Indicating elements obtained from Scopolia japonica.		Chemical substances	Pharmacological
scoto-	scot-, scoto-, skoto-	Darkness.	example(s) from: w:scotopic vision	Colours, shapes, and textures	Colours	Shades		3 - Dark
Scoto-	Scoto-, Scotto-	Scottish, Scotland, or the historical Scotti people.		Proper nouns	Extant countries
scroto-	scroto-	Relating to the scrotum.		Body parts	Anatomical regions
Scytho-	Scytho-	Pertaining to Scythia, Scythian or the Scythians.		Proper nouns	Historical countries
se-1	se-1	(non-productive) Apart, away from.	e.g. secede, seclude, segregate	Abstract	Spatial			Away
se-2	se-2	(non-productive) Without.	e.g. secure	Abstract	Possession
sebo-	sebace-, sebo-	Sebum.		Body parts	Bodily fluids
sec-	sec-	(chemistry) secondary-form of a functional group, a branched functional group.		Abstract: Quantity	Numbers	Ordinal		2
seismo-	seismo-	Earthquakes.		Weather and natural disasters	Seismic
selen-	selen-, seleno-1	The Moon.		Celestial bodies and their rotations	Solar system
selenio-	selenio-, seleno-2	Selenium.		Chemical substances	Elements
self-	self-	Self, ones own.	example(s) from: self-sufficient, self-explanatory	Abstract	Self
semanto-	semanto-	Semantic.		Academic disciplines	Linguistics
semi-1	semi-1	half.		Abstract: Quantity	Numbers	Cardinal		0.5
semi-2	semi-2	partial, incomplete.		Abstract	Completion
semi-3	semi-3	somewhat, rather, quasi-.		Abstract	Similarity
semin-	semin-	Semen, seed.		Body parts	Gametes
semio-	semio-	Sign, symbol, signifier.		Academic disciplines	Linguistics
Semito-	Semito-	Semites.		Proper nouns	Languages
semper-	semper-	Always, unvarying.	e.g. semperannual, sempergreen, semperjuvenescent	Abstract	Temporal			Permanent
sen-	sen-	Old.		Abstract	Temporal			2 - Old
sept-	sept-, septa-, septem-, septi-, septua-	Seven.		Abstract: Quantity	Numbers	Cardinal		7
septo-	septo-	Partition.		Abstract	Composition			Un-joining
sequ-1	sequ-1	A sequence.		Abstract	Routing
Serbo-	Serbo-	Serbian.		Proper nouns	Extant countries
sero-	sero-	Serum; presence in blood.		Body parts	Bodily fluids
sesqui-	sesqui-	3/2.		Abstract: Quantity	Numbers	Cardinal		1.5
sexa-	sex-, sexa-	Six.		Abstract: Quantity	Numbers	Cardinal		6
sexuo-	sexuo-	(rare) Of or concerning sexuality.	e.g. sexuoerotic, sexuo-economic	Academic disciplines	Societal
she-	she-	A female, usually an animal.		Life stages	Genders
sialo-	sial-, sialo-	Saliva.	example(s) from: sialagogue	Body parts	Bodily fluids
Siamo-	Siamo-	Pertaining to Thailand or to Thai(s).		Proper nouns	Extant countries
Sibero-	Sibero-	Siberia, Siberian.		Proper nouns	Historical countries
Siculo-	Siculo-	Sicily, Sicilian.		Proper nouns	Historical countries
sidero-1	sidero-1	Of stars and constellations.		Celestial bodies and their rotations	General
sidero-2	sidero-2	(astronomy) Sidereal.		Abstract	Spatial
sidero-3	sidero-3	Iron.		Chemical substances	Elements
sigmoido-	sigmoid-, sigmoido-	Sigmoid colon.	example(s) from: w:sigmoid colon	Body parts	Intestines
silici-	silici-	Silex; silica.		Chemical substances	Materials
silico-	silico-	Silicon.		Chemical substances	Elements
simio-	simio-	Related to simians.		Lifeforms	Animals
simul-	simul-	Resembling, likeness.		Abstract	Similarity			= Similar
sinistro-	sinistr-, sinistro-	Leftwards, to the left.	example(s) from: sinistrocardia	Abstract	Spatial			Left
Sino-	Sino-	China.	e.g. Sinophone	Proper nouns	Extant countries
sinuso-	sino-, sinus-, sinuso-	Sinus.	example(s) from: sinusitis	Body parts	Cavities
siphono-	siphono-	Siphon.		Colours, shapes, and textures	Shapes			Curly
sito-	sito-	Food, especially grain.	e.g. sitosterol, sitosterone; example(s) from: sitophobia	Chemical substances	Foods
skeleto-	skeleto-	Skeleton.		Body parts	Bones
skia-'	skia-	Lack of colour.		Colours, shapes, and textures	Colours	Shades		! - Colourless
Slavo-	Slavo-	Slavic.	e.g. Slavophone	Proper nouns	Languages
Slovako-	Slovako-	Pertaining to Slovakia or Slovakian.	e.g. Slovakophone	Proper nouns	Extant countries
Sloveno-	Sloveno-	Pertaining to Slovenia.		Proper nouns	Extant countries
socio-	soci-, socio-	Social, society, sociological.	example(s) from: sociopath	Academic disciplines	Societal
sodio-	sodio-	(chemistry) Compound of sodium.		Chemical substances	Elements
soleno-	soleno-	Having a tube, a duct or a pipe; Having a cavity by which something can pass, like venom.		Colours, shapes, and textures	Shapes			Cylindrical
Somali-	Somali-	Somalia, Somalian.		Proper nouns	Extant countries
somato-	somat-, somatico-, somato-	The body. Bodily.	example(s) from: somatic	Body parts	Anatomical regions
somno-	somn-, somn-, somni-, somno-	Sleep.		Body processes	Bodily needs and functions
sono-1	sono-1	Sonic, sound. Used particularly for technologies that use sound.	e.g. sonomicrometry, sonobuoy, sonochemistry	Physical properties	Other physical properties
sono-2	sono-2	The perception of sound.	e.g. sonophobia, sonosensitizer, sonotaxis	Body processes	Sensory
sous-1	sous-1	Under, underneath.	e.g. sousveillance, souterrain, sous-vide	Abstract	Spatial			Beneath
sous-2	sous-2	Subordinate.	e.g. sous-chef, sous-lieutenant	Abstract	Ranking
Sovieto-	Sovieto-	Soviet Union.		Proper nouns	Historical countries
spano-	spano-	Scarce.		Abstract: Quantity	Quantity	Amount		< Not much
spasmo-	spasmo-	Spasm.	example(s) from: w:Spasmodic dysphonia	Body processes	Pathological
spatio-	spatio-	Spatial. space.		Abstract	Basis
spec-	spec-	Look, see.		Body processes	Sensory
spectro-	spectro-	Optical spectra.	e.g. spectrometer, spectromicroscopy, spectrospatial	Physical properties	Other physical properties
speleo-	speleo-	Cave.		Landforms and ecosystems	Landforms
spermato-	sperma-, spermato-, spermo-	Sperm, semen.	example(s) from: spermatogenesis	Body parts	Gametes
spheno-	sphen-, spheno-	Wedge-shaped.		Colours, shapes, and textures	Shapes			Yonic
sphero-	spher-, spherico-, sphero-	Spherical.		Colours, shapes, and textures	Shapes			Round
sphinctero-	sphinctero-	Sphincter.		Body parts	Muscles
sphygm-	sphygm-, sphygmo-	(medicine) Pulse, pulsation (of blood delivered by the beating heart).		Body processes	Bodily needs and functions
spino-	spino-	Spine, vertebra.		Body parts	Bones
spiro-1	spiro-1	Spiral, coiled.		Colours, shapes, and textures	Shapes			Curly
spiro-2	spiro-2	(medicine) Breathing.		Body processes	Bodily needs and functions
splanchno-	splanchn-, splanchni-, splanchno-	The viscera.	example(s) from: splanchnology	Body parts	Organs
spleno-	splen-, spleno-	Spleen.	example(s) from: splenectomy	Body parts	Organs
spondylo-	spondyl-, spondylo-	The spine.	example(s) from: spondylitis	Body parts	Bones
spongo-	spongio-, spongo-	(zoology) Sponge.		Lifeforms	Animals
sporo-	spor-, spori-, sporo-	Spores.		Body parts	Gametes
squamo-	squamo-, squamos-, squamoso-	Made of scales, scaly.	example(s) from: w:squamous cell	Colours, shapes, and textures	Textures			Scaly
stanno-	stann-, stanno-	Tin.		Chemical substances	Elements
stannoso-	stannoso-	(chemistry) Denoting relation to, or connection with, certain stannous compounds.		Chemical substances	Derivatives
staped-	staped-	Stapes in ear.		Body parts	Ears
staphylo-1	staphylo-1	Pertaining to a microorganism cluster with a grape-like arrangement.		Lifeforms	Bacteria
staphylo-2	staphylo-2	The uvula.		Body parts	Organs
stat-	stat-	State, control.		Abstract	Influences			Control
stato-	stato-	Balance, equilibrium, rest.		Abstract	Rates
stauro-	stauro-	Cross; cross-shaped.		Colours, shapes, and textures	Shapes			Cross
steato-	steato-	Fat.		Body parts	Connective tissues
stego-	stego-	Covered, hidden.		Abstract	Covering
stello-	stello-	Star. celestial body.		Celestial bodies and their rotations	General
steno-1	sten-1, steno-1	Restricted, few, narrow in range (antonym: eury-).	e.g. stenobiomic, stenophagy, stenotherm	Abstract	Similarity
step-	step-	Related via marriage of parent.	example(s) from: stepbrother, stepmother, stepfather, stepsister	Abstract	Parenthood
stereo-1	stereo-1	Three-dimensional.	e.g. stereophonic	Abstract	Basis
stereo-2	stereo-2	Relating to the binocular contribution to three-dimensional vision.	e.g. stereopsis, stereoblind	Body processes	Sensory
stereo-3	stereo-3	Solid, hard.	e.g. stereotype plate	Colours, shapes, and textures	Textures			4 - Hard
stereo-4	stereo-4	Solid.		Physical properties	States of matter
sterno-	stern-, sterno-	Sternum.		Body parts	Bones
stetho-	steth-, stetho-	The chest.	example(s) from: stethoscope	Body parts	Anatomical regions
stheno-	stheno-	Strength, force, power.	e.g. sthenolagnia, sthenic	Abstract	Potency
stibo-	stib-, stibio-, stibo-	(chemistry) Antimony.		Chemical substances	Elements
sticho-	sticho-	Rows.		Abstract	Basis
stigmato-	stigmato-	Mark, point.		Abstract	Landmarks
stomato-	stom-, stomat-, stomato-	Mouth; opening.	example(s) from: stomatogastric, w:stomatognathic system	Body parts	Orifices
strati-	strati-	Layer.		Abstract	Layers
strato-1	strato-1	Strata.		Abstract	Layers			Layer
strato-2	strato-2	Stratus clouds.		Weather and natural disasters	Weather
strepto-	strepto-	Twisted.		Colours, shapes, and textures	Shapes			Curly
striato-	striato-	(anatomy) Striatum.		Body parts	Brain
stronti-	stronti-	Strontium.	e.g. strontianite, strontiofluorite	Chemical substances	Elements
stygo-	stygo-	Dark and damp, like the Underworld.		Physical properties	Climactic conditions
stylo-1	stylo-1	Style, stylus.		Technologies	Communication technologies
stylo-2	stylo-2	(medicine) Styloid process.		Body parts	Bones
sub-1	sub-1, sur-3	Under, beneath.	e.g. subterranean, submarine, subcutaneous	Abstract	Spatial			Beneath
sub-2	sub-2, sur-3	Subsidiary, secondary.	e.g. subplot	Abstract	Ranking
sub-3	sub-3, sur-3	Almost, nearly.	e.g. subconical, subequatorial	Abstract	Similarity			= Similar
succin-	succin-	Relating to or derived from succinic acid.		Chemical substances	Derivatives
succo-	succo-	Juice.	e.g. succose, succotash	Chemical substances	Foods
sucr-	sucr-, sucro-	Sugar.		Chemical substances	Biochemistry
Sudano-	Sudano-	Sudan.		Proper nouns	Extant countries
sudo-	sudo-	Sweat.		Body parts	Bodily fluids
Sueco-	Sueco-, Swedo-	Pertaining to Sweden or Swedish.	e.g. Swedophone	Proper nouns	Extant countries
sui-	sui-	Self, personal.		Abstract	Self
sulfa-	sulfa-, sulpha-	(pharmacology) Used to form names of sulfonamides used as antiinfectives.		Chemical substances	Pharmacological
sulfo-1	sulf-1, sulfo-1, sulph-1, sulpho-1	Sulfur.		Chemical substances	Elements
sulfo-2	sulf-2, sulfo-2, sulph-1, sulpho-1	Sulfonic acid.		Chemical substances	Acids
sulfonio-	sulfonio-, sulphonio-	(chemistry) Sulfur onium.		Chemical substances	Compounds
sulphureo-	sulphureo-	(obsolete) Used as a combining form to indicate sulphureous and some other property.		Chemical substances	Forms
Sumero-	Sumero-	Sumerian.		Proper nouns	Historical countries
super-1	super-1	Located above.	e.g. superoccipital, superlabial, supergastric	Abstract	Spatial			Above
super-10	super-10	Regarding superheroes.		Social facts	Religion & mythology
super-2	super-2	A more inclusive category.	e.g. supercategory, superfamily, superculture	Abstract	Inclusion
super-3	super-3	Beyond, over, or upon.	e.g. supernatural, superhuman, supersonic	Abstract	Transcendence
super-4	super-4	Greater than in quantity.	e.g. superwavelength, supersynchronous, superrotation	Abstract: Quantity	Quantity, relative	Inequality		> More
super-5	super-5	Excessive; exceptionally large in quantity.	e.g. superphosphate, superhydration	Abstract: Quantity	Quantity	Amount		>> Too much
super-6	super-6	Superior in title or status.	example(s) from: supervisor, superintendent	Abstract	Ranking
super-7	super-7	Superior in power or potency.	e.g. supervolcano, supercow, superantigen	Abstract	Potency
super-8	super-8	Augmentative: intensely, extremely, or exceptional.	e.g. superblizzard, superbright, supersharp	Abstract	Normality			Augmentative
super-9	super-9	(physics) Described using supersymmetry.	e.g. superparticle, superpartner, superWIMP	Physical properties	Other physical properties
supero-	supero-	(anatomy) Situated above.		Abstract	Spatial			Above
supra-1	supra-1	Above, over, on top. (anatomy) Superior.	e.g. supralimbic, supraduction, supracaudal	Abstract	Spatial			Above
supra-2	supra-2	Greater than, transcending.	e.g. supralocal, supracultural, supracontext	Abstract	Transcendence
supra-3	supra-3	Augmentative: intensely, extremely, or exceptional.	e.g. suprahuman, supramassive	Abstract	Normality			Augmentative
supra-4	supra-4	More than.	e.g. supramillion, supracritical	Abstract: Quantity	Quantity, relative	Inequality		> More
sur-1	sur-1	Above, on top of.	e.g. suranal, surtop, surangular	Abstract	Spatial			Above
sur-2	sur-2	More than, additional.	e.g. surpass, surabundant, surexpression	Abstract: Quantity	Quantity, relative	Inequality		> More
sursum-	sursum-	In an upwards direction.		Abstract	Spatial			Upward
Swahili-	Swahili-	Swahili.		Proper nouns	Languages
symmetro-	symmetro-	Combining form of symmetry.		Abstract	Symmetry			= Symmetric
sympatho-	sympatho-	(anatomy) Sympathetic nervous system.		Body parts	Organ systems
syn-1	sy-1, syl-1, sym-1, syn-1, sys-1	Identical.	e.g. synonym	Abstract	Similarity
syn-2	sy-2, syl-2, sym-2, syn-2, sys-2	With, together.	example(s) from: syllable, symbol, synthesis, system	Abstract	Composition			Among
syn-3	sy-3, syl-3, sym-3, syn-3, sys-3	Concomitant, at the same time.	e.g. synesthesia	Abstract	Temporal
synapto-1	synapto-1	(anatomy) Synapse.		Body parts	Nerves
synchro-	synchro-	At the same time, synchronous.		Abstract	Temporal			Synchronous
syndesmo-	syndesmo-	Connective tissue.		Body parts	Connective tissues
synovo-	synovo-	Synovia.		Body parts	Bodily fluids
syphilo-	syphilo-	Syphilis.		Body processes	Pathological
syringo-1	syringo-1	Tube, tuboid structure.		Colours, shapes, and textures	Shapes			Cylindrical
syringo-2	syringo-2	(medicine) Fistula.		Body processes	Pathological
Syro-	Syro-	Syria.		Proper nouns	Extant countries
systemo-	system-, systemo-	System.		Abstract	Composition			Whole
systol-	systol-	Contraction.		Abstract	Motion

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References

Prefixes that start with T.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
T-	T-	(media) Thai; used to denote nouns relating to the (popular) culture of Thailand.		Proper nouns	Popular culture
tachy-	tachi-, tacho-, tachy-	Fast, rapid, speed.	example(s) from: tachycardia, tachypnea	Abstract	Rates			Fast
Tagalo-	Tagalo-	Tagalog.		Proper nouns	Languages
Tajiko-	Tajiko-	Tajikistaan, Tajik.		Proper nouns	Extant countries
talo-	talo-	(anatomy) Talus.		Body parts	Bones
tanta-	tanta-	Tantalum.	e.g. tantalate, tantalous	Chemical substances	Elements
Tanza-	Tanza-	Tanzania, Tanzanian.		Proper nouns	Extant countries
tapho-	tapho-	Grave; burial.		Human activities	Other human activities
tars-	tars-	(anatomy) Of or relating to the tarsus.		Body parts	Bones
tarso-	tarso-	Ankle, foot.		Body parts	Anatomical regions
tartro-	tartro-	(chemistry) Tartar.		Chemical substances	Compounds
Tataro-	Tataro-	Tatarstan, Tatar.		Proper nouns	Historical countries
tauro-	tauro-	(biology) Bull.		Lifeforms	Animals
tauto-	taut-, tauto-	The same, identical.		Abstract	Similarity			= Similar
taxo-1	tax-1, taxi-1, taxo-1	A system of classification, order, arrangement.		Abstract	Basis
tebi-	tebi-	240.		Abstract: Quantity	Numbers	Factors		240
technet-	technet-	Technetium.	e.g. technetic, pertechnetate	Chemical substances	Elements
techni-	techni-	(physics) Described using the technicolor model.	e.g. technibaryon, technilepton	Physical properties	Other physical properties
techno-	techno-	Pertaining to technology. Skill, craft.		Academic disciplines	Societal
tecn-	tecn-, tecno-, tekn-	Child.		Life stages	Life cycle
tectono-	tecto-, tectono-	Plate tectonics.	e.g. tectonomagmatic, tectonomorphological, tectonostratigraphy	Landforms and ecosystems	Landforms
tele-1	tele-1	Over a distance.	example(s) from: telegraph, telephone, telescope, television	Abstract	Spatial			Far
tele-2	tele-2	Technologies that operate over a distance: television, telegraph, telephone, etc.	e.g. telethon, telecast, telesale	Technologies	Types of technologies
teleio-	teleio-	Fully grown; adult.		Life stages	Life cycle
teleo-	teleo-	Purpose, design, intent.	e.g. teleology, teleophobia, teleocracy	Abstract	Intention			Intention
tellur-	tellur-, telluri-, telluro-2	Tellurium.		Chemical substances	Elements
telluro-1	telluro-1	Earth.		Celestial bodies and their rotations	Solar system
telo-	telo-	End, complete.		Abstract	Temporal
tempo-	tempo-	Tempo, time.		Abstract	Temporal
temporo-	temporo-	(anatomy) Temporal; temples .		Body parts	Brain
teno-	tendo-, teno-	Tendon.		Body parts	Connective tissues
tenso-	tenso-	Stretched, strained.		Abstract	Flexibility
tephro-2	tephro-2	(medicine) Gray or ashen.		Colours, shapes, and textures	Colours	Shades		2 - Grey
ter-	ter-	Three.		Abstract: Quantity	Numbers	Cardinal		3
tera-	tera-	Trillion, 1012.		Abstract: Quantity	Numbers	Factors		1012
terato-	terato-	Monstrous, abnormal, deformed.	example(s) from: teratoma, teratogen	Body processes	Pathological
terb-	terb-	Terbium.	e.g. terbia, terbic	Chemical substances	Elements
term-	term-	To limit, end.		Abstract	Completion
tert-	tert-	(chemistry) Tertiary form.		Abstract: Quantity	Numbers	Ordinal		3
testiculo-	testiculo-	Testicle.		Body parts	Organs
testo-	testo-	The testes.		Body parts	Organs
tetan-	tetan-	(medicine) Rigid, tense.	example(s) from: tetanus	Abstract	Motion
tetra-	tessara-, tetr-, tetra-, tetrakis-	Four.		Abstract: Quantity	Numbers	Cardinal		4
tetracosa-	tetracosa-	Twenty-four.		Abstract: Quantity	Numbers	Cardinal		24
tetradeca-	tetradeca-, tetrakaideca-, tetrakaideka-	Fourteen.		Abstract: Quantity	Numbers	Cardinal		14
Teuto-	Teuto-, Teutono-	The Teutons, historical Germanic people, or present-day Germans.	e.g. Teutophone	Proper nouns	Extant countries
th-	th-	(obsolete) The.		Abstract	Specificity
thalamo-	thalamo-, thalmo-	(anatomy) Thalamus.		Body parts	Brain
thalasso-	thalass-, thalasso-	The sea.		Landforms and ecosystems	Oceanic
thall-	thall-	Thallium.	e.g. thallane, thallous	Chemical substances	Elements
thanato-	thanato-	Death.	e.g. thanatochemistry, thanatography, thanatomania	Life stages	Life cycle
thaumato-	thaumat-, thaumato-	Miracle, wonder, marvel.		Social facts	Religion & mythology
thec-	thec-	(medicine) Case, sheath.	example(s) from: intrathecal	Colours, shapes, and textures	Shapes			Cylindrical
thel-	thel-	(medicine) Nipple, teat.	example(s) from: w:Theleplasty, thelarche	Body parts	Orifices
thely-	thely-	(medicine) Pertaining to women; feminine.	example(s) from: w:Thelygenous	Life stages	Genders
theo-	the-, theo-	Religion, gods, deities.		Social facts	Religion & mythology
therap-	therap-	Therapeutic, healing.	example(s) from: hydrotherapy, therapeutic	Human activities	Healing
therio-	theri-, therio-, thero-	Animal, beast.		Lifeforms	Animals
thermo-	therm-, thermo-	Heat.	example(s) from: hypothermia, thermoregulation	Physical properties	Climactic conditions
Thessalo-	Thessalo-	Thessaly.		Proper nouns	Historical countries
thia-	thia-	Used to form the names of chemical compounds containing sulfur, especially where a sulfur atom replaces an oxygen atom in an analogous compound.		Chemical substances	Substituents
thigmo-	thigmo-	(biology) Related to touching, usually a plant.	e.g. thigmokinesis, thigmotaxis	Abstract	Influences			Touch
thio-	thi-, thio-	Sulfur. Containing sulfur.		Chemical substances	Elements
thoraco-	thora-, thorac-, thoraci-, thoracico-, thoraco-, thorato-	The thorax. Chest.	example(s) from: thoracic spine, thorax	Body parts	Anatomical regions
thori-	thori-	Thorium.	e.g. thorian, thoric	Chemical substances	Elements
thorough-1	thorough-1	Through, via.	e.g. thoroughfare, thoroughgo, thoroughlane	Abstract	Routing
thorough-2	thorough-2	Fully, completely.	e.g. thoroughgoingly, thoroughbreed, thoroughpaced	Abstract	Completion
Thraco-	Thraco-	Thracian.		Proper nouns	Historical countries
thre-	thre-, threo-	(chemistry) Pertaining to general organic structures with adjacent chiral centers.		Abstract	Chemical structures
thrombo-	thromb-, thrombo-	Blood clotting.	example(s) from: thrombus, thrombocytopenia	Body processes	Pathological
thym-	thym-	(medicine) Emotions.	example(s) from: dysthymia	Body processes	Sensory
thymo-	thymo-	(medicine) The thymus.		Body parts	Organs
thyro-	thyr-, thyreo-, thyro-	Thyroid.	e.g. thyroblast, thyrotomy, thyropharyngeal	Body parts	Organs
Tibeto-	Tibeto-	Of or pertaining to Tibet.		Proper nouns	Historical countries
tibio-	tibio-	Tibia.		Body parts	Bones
titano-1	titano-1	Titanium.	e.g. titanomagnetite, titanosilicate	Chemical substances	Elements
titano-2	titano-2	Huge, very large, enormous.		Abstract	Size			Big
to-01	to-01	(non-productive) Parting: forming verbs that involve cleaving, breaking, or sundering.	e.g. tocrack, togrind, torend	Abstract	Composition			Un-joining
to-02	to-02	(non-productive) To do excessively.	e.g. tobeat, topinch, toquake, toruffle	Abstract	Normality			Intensifying
to-03	to-03	(non-productive) Completely.	e.g. tobruise, toreave, torob, toshend	Abstract	Completion
to-04	to-04	(non-productive) Moving.	e.g. tolug, towind	Abstract	Motion
to-05	to-05	Current, the current form of the suffixed time. Forming nouns.	e.g. today, tonight, tosol	Abstract	Temporal
to-06	to-06	On (this) time, which is a fixed point in time. Forming adverbs.	e.g. today, tomorrow, tomorn	Abstract	Temporal
to-07	to-07	During the suffixed time. Forming adverbs.	e.g. today, tonight, toyear	Abstract	Temporal
to-08	to-08	Of, as characteristic of the suffixed time period. Forming adverbs and adjectives.	e.g. today, together	Abstract	Origin
to-09	to-09	At, at the suffixed time. Forming an unfixed point in time, rather than a duration.	e.g. tomorrow, tofall, together	Abstract	Temporal
to-10	to-10	Adding, additional in quantity.	e.g. to-bread, to-name	Abstract	Composition			Joining
to-11	to-11	Toward in direction or location.	e.g. to-draw, tofall, together	Abstract	Spatial
Tocharo-	Tocharo-	Tocharans.		Proper nouns	Historical countries
toco-	toco-, toko-	Childbirth, reproduction.	example(s) from: tocolytic, dystocia	Body processes	Reproduction
tomo-	tomo-	To cut.		Abstract	Composition			Un-joining
tono-1	ton-1, tono-1	(medicine) Tonus: muscle tone, or tension in an organ.	e.g. tonography, myotonometer, hypotonia	Body processes	Bodily needs and functions
tono-2	ton-2, tono-2	(linguistics) Relating to tone in linguistics.	e.g. tonogenesis, tonomorpheme, tonomorphology	Academic disciplines	Linguistics
tono-3	ton-3, tono-3	Acoustic pitch or musical tone.	e.g. tonoscope, tonotopic, tonotopy	Body processes	Sensory
tono-4	ton-4, tono-4	Tension, tense, or stretched.	e.g. tonofibril, tonoplast	Physical properties	Other physical properties
tonsillo-	tonsillo-	Tonsil.		Body parts	Organs
topo-	top-, topo-	Place, area or region.	example(s) from: w:Topical anesthetic	Abstract	Basis
tor-	tor-, tors-, tort-, torti-	To twist. Twisted.	example(s) from: w:Torticollis, w:Testicular torsion	Abstract	Motion
Tosco-	Tosco-	Tuscany.		Proper nouns	Historical countries
toxi-	tox-, toxi-, toxic-, toxico-, toxo-	Toxic, poison.	example(s) from: w:Toxoplasmosis, w:Toxidrome	Body processes	Pathological
trachelo-	trachel-, trachelo-	The neck.	example(s) from: Tracheloplasty	Body parts	Anatomical regions
tracheo-	trache-, trachea-, tracheo-	The trachea.	example(s) from: w:Tracheotomy	Body parts	Tubes and ducts
trans-1	trans-1	Extending across, through, or over.	e.g. transnational, transregional, transamerican	Abstract	Spatial
trans-2	trans-2	To or on the other side of, beyond; outside of.	e.g. transalpine, transuranic	Abstract	Transcendence
trans-3	trans-3	(chemistry) A compound in which two atoms or groups are situated on opposite sides of some plane of symmetry passing through the compound.	e.g. transacetylase, tranexamic acid, transaldolase	Abstract	Spatial
trans-4	trans-4	Transgender or transsexual, or pertaining to those who are transgender or transsexual.	e.g. transmasculine, transfeminist, transphobia	Social facts	Political and social movements
tri-	tri-	Three.	example(s) from: tricycle, tripartite, triangle, tricolor, trinomial	Abstract: Quantity	Numbers	Cardinal		3
trib-	trib-	To pay.		Human activities	Other human activities
tribo-	tribo-	Friction.		Physical properties	Other physical properties
tricho-1	trich-1, trich-1, trichi-1, trichia-1, tricho-1	Hair.	example(s) from: w:Trichocyst	Body parts	Integument
trideca-	trideca-, triskaideca-, triskaideka-	Thirteen.		Abstract: Quantity	Numbers	Cardinal		13
trihydro-	trihydro-	(chemistry) Three hydrogen atoms.		Chemical substances	Forms
tris-	tris-	(chemistry) A variant of tri-, used for substitutions of three complex rather than simple units.		Abstract: Quantity	Numbers	Ordinal		3
trito-	trit-, trito-	Third.		Abstract: Quantity	Numbers	Ordinal		3
trocho-	trocho-	Wheel.		Colours, shapes, and textures	Shapes			Round
trop-	trop-	(pharmacology) Used to form names of atropine derivatives.		Chemical substances	Pharmacological
tropho-	tropho-	Nutrients, food.		Body processes	Bodily needs and functions
tropo-	tropo-	Change, turn, difference.	e.g. tropophobia, tropomorphic, troposphere	Abstract	Similarity			! Variety
tru-	tru-	(slang) True, genuine.		Abstract: Correctness	Correctness	Genuine		= True
trypano-	trypano-	Trypanosome.		Lifeforms	Bacteria
tubo-	tubo-	Tube.		Colours, shapes, and textures	Shapes			Cylindrical
tubul-	tubul-, tubulo-	Tubules, microtubules.		Colours, shapes, and textures	Shapes			Cylindrical
tungsto-	tungsto-	Tungsten.		Chemical substances	Elements
Tuniso-	Tuniso-	Tunisia, Tunisian.		Proper nouns	Extant countries
turbo-1	turbo-1	A turbine.	e.g. turboprop, turboalternator, turboshaft	Technologies	Tools and machine components
turbo-2	turbo-2	To accelerate.		Abstract	Rates
Turco-	Turco-, Turko-	Turkish, Turkey.	e.g. Turkophone	Proper nouns	Extant countries
Turdetano-	Turdetano-	Turdetani, Turdetania.		Proper nouns	Historical countries
Turkmeno-	Turkmeno-	Turkmen, Turkmenistan.		Proper nouns	Extant countries
twi-1	twi-1	Two, having two.	e.g. twi-headed, twi-coloured, twifaced	Abstract: Quantity	Numbers	Cardinal		2
twi-2	twi-2	Second.	e.g. twilight, twichild, twifallow	Abstract: Quantity	Numbers	Ordinal		2
tympano-	tympan-, tympano-	The eardrum.	example(s) from: w:Tympanocentesis, w:Tensor tympani	Body parts	Ears
typhl-	typhl-, typhlo-	Blindness.		Body processes	Pathological
typo-	typ-, typo-	Print, writing, typography.	e.g. typolithography, typometer, typophile	Technologies	Communication technologies
tyranno-	tyranno-, tyrrano-	Tyranny; tyrannical.		Social facts	Social and political movements
tyro-	tyro-	Cheese.	e.g. tyrosine, tyrotoxin, tyromancy	Chemical substances	Foods
Tyrrheno-	Tyrrheno-	Tyrrhenia (Etruria).		Proper nouns	Historical countries

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Prefixes that start with U.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
uber-	uber-, über-	Augmentative: super; really; mega-.	e.g. uberdork, ubergeek	Abstract	Normality			Augmentative
udi-	udi-	(soil science) Udic.		Physical properties	Climactic conditions
Ugando-	Ugando-	Uganda.		Proper nouns	Extant countries
Ugro-	Ugro-	Ugric, Ugrian.		Proper nouns	Historical countries
Ukraino-	Ukraino-, Ukro-	Ukranian.	e.g. Ukrainophone	Proper nouns	Extant countries
ulcero-	ulcero-	Ulcer.		Body processes	Pathological
ulno-	ulno-	The ulna bone.		Body parts	Bones
ulo-	ulo-	Scar.		Body processes	Pathological
ulter-	ulter-	Beyond, farther.		Abstract	Transcendence
ultima-	ultima-	Last, final.		Abstract	Temporal			1 - Final
ultra-1	ultra-1	Greater than normal quantity or importance.	e.g. ultrasecret	Abstract: Quantity	Quantity, relative	Inequality		> More
ultra-2	ultra-2	Beyond, on the far side of.	e.g. ultraviolet	Abstract	Spatial			Opposite
ultra-3	ultra-3	Beyond, outside of.	e.g. ultrasonic	Abstract	Spatial			Outside
ultra-4	ultra-4	Augmentative: intensely, extremely, or exceptional. Excessively, to an extreme.	example(s) from: ultramicroscopic, ultra-careful	Abstract	Normality			Augmentative
ulvu-	ulvu-	Uvula.		Body parts	Organs
um-	um-, umb-, umbe-	Around, about.	example(s) from: umbestound	Abstract	Spatial			Around
umbilic-	umbilic-, umbilico-	Umbilical cord, navel.	e.g. umbilicoplacental, umbilicoplasty	Body parts	Anatomical regions
umbra-	umbra-	Shadow.		Colours, shapes, and textures	Colours	Shades		3 - Dark
Umbro-	Umbro-	Pertaining to Umbria or Umbrian.		Proper nouns	Historical countries
un-1	un-1	Not.	e.g. uneducated, unknown, unklocked	Abstract	Negation
un-2	un-2	Lack of.	e.g. unconformity, unemployed	Abstract	Insufficiency
un-3	un-3	Contrary to traditional norms, unconventional.	e.g. unschooling, unconference	Abstract	Similarity			! Different
undeca-	undeca-	Eleven.		Abstract: Quantity	Numbers	Cardinal		11
under-1	under-1	Beneath, under.	e.g. underpass, underground, underneath	Abstract	Spatial			Beneath
under-2	under-2	To progress along a path (metaphorical).	e.g. understand, undergo, underbear, undertake	Abstract	Completion
under-3	under-3	Less than, beneath in quantity.	e.g. underadditive, underage, underbound	Abstract: Quantity	Quantity, relative	Inequality		< Less
under-4	under-4	Deficient.	e.g. underapply, underbill, underawe	Abstract	Insufficiency
under-5	under-5	Subordinate to.	e.g. undersecretary, underling	Abstract	Ranking
ungui-	ungui-, unguo-	Nail, claw.	example(s) from: unguiform, ungual	Body parts	Integument
uni-	uni-	One, single.	example(s) from: unicycle, universal	Abstract: Quantity	Numbers	Cardinal		1
up-1	up-1	Increase.	e.g. uprate	Abstract	Rates
up-2	up-2	Upwards; ised to indicate higher position or direction, literally or figuratively..	example(s) from: upgrade, uplift, upright	Abstract	Spatial			Upward
ur-	ur-	Original, primitive, earliest.	e.g. ur-ancestor, urlanguage	Abstract	Temporal			0 - First
Uralo-	Uralo-	Uralic languages.		Proper nouns	Languages
uran-	uran-	(chemistry) Uranite.	e.g. uranite, uranitic	Chemical substances	Elements
urano-1	urano-1	Uranus. Also used for the heavens more broadly.		Celestial bodies and their rotations	Solar system
urano-2	urano-2	(anatomy) Palate.		Body parts	Anatomical regions
uranoso-	uranoso-	(chemistry) Uranous.		Chemical substances	Elements
Urdu-	Urdu-	Urdu.	e.g. Urduphone	Proper nouns	Languages
ureido-	ureido-	(chemistry) Ureylene. Containing the univalent radical NH2CONH–.		Chemical substances	Radicals
ureo-	ure-, ureo-	Urea.		Chemical substances	Biochemistry
uretero-	uretero-, ureto-	(anatomy) Ureter.		Body parts	Tubes and ducts
urethr-	urethr-, urethro-	(anatomy) Urethra.		Body parts	Orifices
uric-	uric-	Urinary condition.		Body processes	Pathological
urino-	ur-, urin-, urino-, uro-1	Pertaining to urine and the urinary system.	example(s) from: antidiuretic, diuresis, diuretic, dysuria, enuresis, polyurea, polyuria, uraemia/uremia, uremic, ureter, urethra, urology	Body parts	Organ systems
uro-2	uro-	Tail.		Body parts	Anatomical regions
utero-	uter-, utero-	(anatomy) Uterus.	e.g. uteroabdominal, uteralgia	Body parts	Organs
Uto-	Uto-	Ute languages.		Proper nouns	Languages
utriculo-	utriculo-	(anatomy) utricle.		Body parts	Ears
uveo-	uveo-	Uvea, the middle layer of the eye.		Body parts	Eyes
uvul-	uvul-, uvulo-	Uvula.		Body parts	Organs
Uzbeco-	Uzbeco-	Uzbek, Uzbekistan.		Proper nouns	Extant countries

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Prefixes that start with V.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
V-	V-	(media) Vietnamese; used to denote nouns relating to the (popular) culture of Vietnam.		Proper nouns	Popular culture
vac-	vac-	Empty.		Abstract	Fullness			Empty
vacci-	vacci-	Cow, cows.		Lifeforms	Animals
vagino-	vagin-, vagino-	Pertaining to the vagina.	example(s) from: w:vaginal epithelium	Body parts	Organs
vago-	vago-	(medicine) Pertaining to the vagus nerve.		Body parts	Nerves
val-	val-, valu-	Worth, value.		Social facts	Social institutions
valero-	valero-	Valerian.		Lifeforms	Plants
valv-	valv-, valvo-, valvul-, valvulo-	Valve.		Colours, shapes, and textures	Shapes			Cylindrical
vanad-	vanad-	Vanadium.	e.g. vanadocene, vanadyl	Chemical substances	Elements
vari-	vari-	Various, variety.	e.g. variform, varigauge, varihued	Abstract	Similarity			! Variety
varico-	varic-, varico-	(medicine) Varicose vein.	example(s) from: varicose, w:esophageal varices	Body parts	Tubes and ducts
vas-	vas-	Vas deferens.		Body parts	Tubes and ducts
Vasco-	Basco-, Vasco-	Basque, Basque Country.	e.g. Bascophone	Proper nouns	Languages
vasculo-	vasculo-	Vessels, blood vessels, lymphatic vessels.	e.g. vasculometabolic, vasculopathy	Body parts	Tubes and ducts
vaso-	vaso-	Vessel; (medicine) blood vessels, blood pressure.	example(s) from: vasoconstriction	Body parts	Tubes and ducts
vegeto-	vegeto-	Vegetable, vegetal.	e.g. vegeto-mineral, vegetoanimal	Lifeforms	Plants
velo-1	velo-1	Bicycle, cycling.		Technologies	Transportation
velo-2	velo-2	(anatomy) Velum.		Body parts	Brain
ven-	ven-, veni-, veno-	(medicine) Vein.	example(s) from: venule, venospasm	Body parts	Tubes and ducts
venero-	venero-	Sexual contact, venereal.		Body processes	Pathological
ventilo-	ventilo-	To aerate, oxygenate.		Body processes	Bodily needs and functions
ventri-	ventr-, ventri-, ventro-	(anatomy) The ventral (belly) side of the body.	example(s) from: ventrodorsal	Abstract	Spatial
ventriculo-	ventricul-, ventriculo-	(medicine) Ventricle.	example(s) from: w:cardiac ventriculography, w:atrioventricular node	Body parts	Cavities
ver-	ver-	Truth, correct.		Abstract: Correctness	Correctness	Truth		= True
vermi-	vermi-	Worm-shaped, worms.		Lifeforms	Animals
versi-	versi-, verso-, vert-, verti-	Turn, change.		Abstract	Flexibility
vertebro-	vertebro-	Vertebra.		Body parts	Bones
vesico-	vesic-, vesico-	(medicine) Bladder.	example(s) from: w:vesical arteries	Body parts	Organs
vesiculo-	vesiculo-	Blister.		Body processes	Pathological
vestibulo-	vestibulo-	The ear, balance, vestibular system.		Body parts	Organ systems
vexillo-	vexillo-	Flags.		Technologies	Communication technologies
vibro-	vibro-	Vibration, oscillation, shaking.		Abstract	Motion
vice-	vic-, vice-	Replacement, deputy, assistant.	example(s) from: vice-president, vice-principal, vice-admiral	Abstract	Ranking
video-	video-	Moving images, especially television.		Technologies	Communication technologies
vigen-	vigen-, viginti-	Twenty.		Abstract: Quantity	Numbers	Cardinal		20
vin-	vin-	(pharmacology) Vinca alkaloids.		Chemical substances	Pharmacological
viri-	viri-, viro-	Virus.		Body processes	Pathological
viscero-	viscer-, viscero-	(medicine) The viscera, organs.	example(s) from: viscera	Body parts	Organs
visco-	visco-	Viscous.		Abstract	Mass
visuo-	visuo-	Vision, sight.		Body processes	Sensory
vitello-	vitello-	Egg yolk.		Body parts	Membranes
vitreo-1	vitreo-1	Glass.	e.g. vitreography, vitrine	Chemical substances	Materials
vitro-2	vitreo-2	(anatomy) Vitreous body of the eye.	e.g. vitreopapillary, vitreoretinopathy	Body parts	Eyes
Vivaro-	Vivaro-	Vivarais (France).		Proper nouns	Historical countries
vivi-	vivi-, vivo-	Living, alive.	e.g. vivisection	Body processes	Bodily needs and functions
vol-	vol-	Will, volition.		Body processes	Bodily needs and functions
volcan-	volcan-	Volcanoes.		Landforms and ecosystems	Landforms
volt-	volt-	Circular tread, sudden movement.		Abstract	Motion
volvo-	volvo-	Turn about, roll.		Abstract	Spatial
vulvo-	vulvo-	Pertaining to the vulva.		Body parts	Anatomical regions

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Prefixes that start with W.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
wan-	wan-	Bad, lacking.		Abstract: Correctness	Correctness	Goodness		! Bad
war-	war-	Relating to gaining access to network resources, such as Wi-Fi, by locating and exploiting unprotected access addresses.		Human activities	Other human activities
were-	were-	Lycanthrope, werewolf.		Social facts	Religion & mythology
where-	where-	Which, what, whom.		Abstract	Interrogation
with-1	with-1	Against, in opposition to.	e.g. withstand, withsay, withspeak	Abstract	Polarity			Opposition
with-2	with-2	Back, in reverse.	example(s) from: withstand, withhold	Abstract	Negation
with-3	with-3	Off, out, away, from.	example(s) from: withstand, withhold	Abstract	Spatial
with-4	with-4	With, along with, together with.	example(s) from: withstand, withhold	Abstract	Composition			Among
wither-	wither-	Against.		Abstract	Polarity			Opposition

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Prefixes that start with X.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
xantho-	xanth-, xantho-	Yellow.	example(s) from: xanthopathy	Colours, shapes, and textures	Colours	Hues		3 - Yellow
xen-2	xen-2	Xenon.	e.g. xenic acid, xenonium	Chemical substances	Elements
xeno-	xen-1, xeno-	Foreign.	example(s) from: xenograft	Abstract	Similarity			! Different
xeri-	xeri-	Dry, arid, particularly of a physical environment.	e.g. xeriscape, xeric	Physical properties	Climactic conditions
xero-	xer-, xero-	Dry, dryness.	example(s) from: xerostomia, xeroderma	Physical properties	Climactic conditions
xipho-	xiph-, xipho-	In the shape of a sword.	example(s) from: xiphisternum, xiphoid, xiphoidalgia	Colours, shapes, and textures	Shapes			Cross
xylo-	xyl-, xylo-	Wood, wooden.	e.g. xylophone, xylohexaose	Chemical substances	Materials
xyr-	xyr-, xyro-	Razor, razor-like.		Colours, shapes, and textures	Shapes			Cylindrical

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Prefixes that start with Y.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
y-	a-08, i-1, y-	Obsolete prefix used to form past participles.	example(s) from: yclad, yclept (both archaic words)	Abstract	Temporal			4 - Past
yester-	yester-	Yesterday, previous.		Abstract	Temporal			4 - Past
yobi-	yobi-	280 = 1,0248.		Abstract: Quantity	Numbers	Factors		280
yocto-	yocto-	×10-24.		Abstract: Quantity	Numbers	Factors		10-24
yotta-	yotta-	×1024.		Abstract: Quantity	Numbers	Factors		1024
yttro-	yttro-	Yttrium.		Chemical substances	Elements
Yugo-	Yugo-	Yugoslavia, Yugoslavian.		Proper nouns	Historical countries

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Prefixes that start with Z.

Prefix	All forms	Definition	Example	Category	Subcat	Subsub	Crosscat	Alt-Sort
Zarma-	Zarma-	Zarma languages.	e.g. Zarmaphone	Proper nouns	Languages
ze-	ze-	(medicine) Boil.	example(s) from: eczema	Body processes	Pathological
zebi-	zebi-	270 = 1,0247.		Abstract: Quantity	Numbers	Factors		270
zeno-	zeno-	Jupiter.		Celestial bodies and their rotations	Solar system
zepto-	zepto-	×10-21.		Abstract: Quantity	Numbers	Factors		10-21
zetta-	zetta-	×1021.		Abstract: Quantity	Numbers	Factors		1021
zinco-	zinco-	Pertaining to zinc.		Chemical substances	Elements
zirco-	zirco-	Zirconium.		Chemical substances	Elements
zono-	zono-	Zone; zonal.		Abstract	Basis
zoo-	zo-, zoo-, zoö-	Animal.	example(s) from: zoology	Lifeforms	Animals
zygo-	zyg-, zygo-	Joining or pairing; union, pair.		Abstract	Composition			Joining
zygomatico-	zygomatico-	(anatomy) Zygomatic.		Body parts	Bones
zym-	zym-, zymo-	Enzymes, fermentation.	example(s) from: enzyme, lysozyme	Chemical substances	Biochemistry