adhaereo

Latin

From ad- (“to, towards, at”) +‎ haereō (“cleave, cling”).

adhaereō (present infinitive adhaerēre, perfect active adhaesī, supine adhaesum); second conjugation, no passive

to cleave or stick to
(figuratively) to cling to, adhere to
(figuratively) to be close to (a person or thing), be near to, hang on, keep close to
(figuratively) to trail, drag after; to be the last

This verb has only limited passive conjugation; only third-person passive forms are attested in surviving sources.

Conjugation of adhaereō (second conjugation, active only)
indicative		singular			plural
indicative		first	second	third	first	second	third
active	present	adhaereō	adhaerēs	adhaeret	adhaerēmus	adhaerētis	adhaerent
	imperfect	adhaerēbam	adhaerēbās	adhaerēbat	adhaerēbāmus	adhaerēbātis	adhaerēbant
	future	adhaerēbō	adhaerēbis	adhaerēbit	adhaerēbimus	adhaerēbitis	adhaerēbunt
	perfect	adhaesī	adhaesistī	adhaesit	adhaesimus	adhaesistis	adhaesērunt, adhaesēre
	pluperfect	adhaeseram	adhaeserās	adhaeserat	adhaeserāmus	adhaeserātis	adhaeserant
	future perfect	adhaeserō	adhaeseris	adhaeserit	adhaeserimus	adhaeseritis	adhaeserint
subjunctive		singular			plural
subjunctive		first	second	third	first	second	third
active	present	adhaeream	adhaereās	adhaereat	adhaereāmus	adhaereātis	adhaereant
	imperfect	adhaerērem	adhaerērēs	adhaerēret	adhaerērēmus	adhaerērētis	adhaerērent
	perfect	adhaeserim	adhaeserīs	adhaeserit	adhaeserīmus	adhaeserītis	adhaeserint
	pluperfect	adhaesissem	adhaesissēs	adhaesisset	adhaesissēmus	adhaesissētis	adhaesissent
imperative		singular			plural
imperative		first	second	third	first	second	third
active	present	—	adhaerē	—	—	adhaerēte	—
active	future	—	adhaerētō	adhaerētō	—	adhaerētōte	adhaerentō
non-finite forms		active			passive
non-finite forms		present	perfect	future	present	perfect	future
infinitives		adhaerēre	adhaesisse	adhaesūrum esse	—	—	—
participles		adhaerēns	—	adhaesūrus	—	—	—
verbal nouns		gerund				supine
		genitive	dative	accusative	ablative	accusative	ablative
		adhaerendī	adhaerendō	adhaerendum	adhaerendō	adhaesum	adhaesū

Catalan: adherir
English: adhere
→ French: adhérer
Galician: adherir
Italian: aderire
Old French: aerdre, aherdre
- Middle French: aherdre, adherdre
  - French: aherdre (dialectal), ahers (dialectal, Burgundy)
- Norman: aherdre (Pays de Bray, Pays de Caux)
- Picard: aerde
Portuguese: aderir
Spanish: adherir

“adhaereo”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
“adhaereo”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
adhaereo in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.