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From Proto-Indo-European *wert- ( “ to turn ” ) .[ 1]
*werteti
to turn over
Thematic present, suffixless preterite
Active voice
Present
Imperfect
Future
Preterite
1st singular
*wertū
*wertemam
*wiwritsū
*weworta
2nd singular
*wertesi
*wertetās
*wiwritsesi
*wewortas?
3rd singular
*werteti
*werteto
*wiwritseti
*weworte
1st plural
*wertomosi
*wertemo
*wiwritsomosi
*wewortmo
2nd plural
*wertetesi
*wertestē
*wiwritsetesi
*weworsse
3rd plural
*wertonti
*wertento
*wiwritsonti
*wewortars
Pres. subjunctive
Past subjunctive
Imperative
1st singular
*wertsū
?
—
2nd singular
*wertsesi
?
*werte
3rd singular
*wertseti
?
*wertetou
1st plural
*wertsomosi
?
*wertomos
2nd plural
*wertsetesi
?
*wertete
3rd plural
*wertsonti
?
*wertontou
Passive voice
Present
Imperfect
Future
Preterite
1st singular
*wertūr
—
*wiwritsūr
*wewortra
2nd singular
*wertetar
—
*wiwritsetar
*wewortras?
3rd singular
*wertetor
?
*wiwritsetor
*wewortre
1st plural
*wertommor
—
*wiwritsommor
?
2nd plural
*wertedwe
—
*wiwritsedwe
?
3rd plural
*wertontor
?
*wiwritsontor
?
Pres. subjunctive
Past subjunctive
Imperative
1st singular
*wertsūr
—
—
2nd singular
*wertsetar
—
—
3rd singular
*wertsetor
—
—
1st plural
*wertsommor
—
—
2nd plural
*wertsedwe
—
—
3rd plural
*wertsontor
—
—
Declension of the present participle
masculine
singular
dual
plural
nominative
*wertonts
*wertonte
*wertontes
vocative
*wertonts
*wertonte
*wertontes
accusative
*wertontam
*wertonte
*wertontans
genitive
*wertantos
*?
*wertantom
dative
*wertantei
*wertantbom
*wertantbos
instrumental
*wertantī?
*wertantbim
*wertantbis
feminine
singular
dual
plural
nominative
*wertantī
*wertantī
*wertantiyās
vocative
*wertantī
*wertantī
*wertantiyās
accusative
*wertantīm
*wertantī
*wertantiyans
genitive
*wertantyās
*?
*wertantyom
dative
*wertantyāi
*wertantyābom
*wertantyābos
instrumental
*?
*wertantyābim
*wertantyābis
neuter
singular
dual
plural
nominative
*wertont
*?
*wertonta
vocative
*wertont
*?
*wertonta
accusative
*wertont
*?
*wertonta
genitive
*wertantos
*?
*wertantom
dative
*wertantei
*?
*wertantbos
instrumental
*wertantī?
*?
*wertantbis
Declension of the middle participle
masculine
singular
dual
plural
nominative
*wertomnos
*wertomnou
*wertomnoi
vocative
*wertomne
*wertomnou
*wertomnoi
accusative
*wertomnom
*wertomnou
*wertomnons
genitive
*wertomnī
*wertomnous
*wertomnom
dative
*wertomnūi
*wertomnobom
*wertomnobos
instrumental
*wertomnū
*wertomnobim
*wertomnobis
feminine
singular
dual
plural
nominative
*wertomnā
*wertomnai
*wertomnās
vocative
*wertomnā
*wertomnai
*wertomnās
accusative
*wertomnam
*wertomnai
*wertomnans
genitive
*wertomnās
*wertomnous
*wertomnom
dative
*wertomnai
*wertomnābom
*wertomnābos
instrumental
*?
*wertomnābim
*wertomnābis
neuter
singular
dual
plural
nominative
*wertomnom
*wertomnou
*wertomnā
vocative
*wertomnom
*wertomnou
*wertomnā
accusative
*wertomnom
*wertomnou
*wertomnā
genitive
*wertomnī
*wertomnous
*wertomnom
dative
*wertomnūi
*wertomnobom
*wertomnobos
instrumental
*wertomnū
*wertomnobim
*wertomnobis
Declension of the past participle
masculine
singular
dual
plural
nominative
*wrissos
*wrissou
*wrissoi
vocative
*wrisse
*wrissou
*wrissoi
accusative
*wrissom
*wrissou
*wrissons
genitive
*wrissī
*wrissous
*wrissom
dative
*wrissūi
*wrissobom
*wrissobos
instrumental
*wrissū
*wrissobim
*wrissobis
feminine
singular
dual
plural
nominative
*wrissā
*wrissai
*wrissās
vocative
*wrissā
*wrissai
*wrissās
accusative
*wrissam
*wrissai
*wrissans
genitive
*wrissās
*wrissous
*wrissom
dative
*wrissai
*wrissābom
*wrissābos
instrumental
*?
*wrissābim
*wrissābis
neuter
singular
dual
plural
nominative
*wrissom
*wrissou
*wrissā
vocative
*wrissom
*wrissou
*wrissā
accusative
*wrissom
*wrissou
*wrissā
genitive
*wrissī
*wrissous
*wrissom
dative
*wrissūi
*wrissobom
*wrissobos
instrumental
*wrissū
*wrissobim
*wrissobis
Proto-Brythonic: ( shifting to mean "to sell" )
⇒ Old Irish: ad·ferta ( changed to a weak verb )
^ Le Mair, Esther (2011 September 30) Secondary Verbs in Old Irish: A comparative-historical study of patterns of verbal derivation in the Old Irish Glosses , Galway: National University of Ireland, page 83