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From Proto-Indo-European *nigyéti (whence also Ancient Greek νίζω ( nízō ) ), from *neygʷ- ( “ to wash ” ) . The loss of labialization when *-yéti was attached is regular.
*nigyeti [ 1]
to wash
Synonyms: *ameti , *wolkīti
Thematic present, suffixless preterite
Active voice
Present
Imperfect
Future
Preterite
1st singular
*nigyū
*nigyemam
*ninixsū
*ninoiga
2nd singular
*nigyesi
*nigyetās
*ninixsesi
*ninoigas?
3rd singular
*nigyeti
*nigyeto
*ninixseti
*ninoige
1st plural
*nigyomosi
*nigyemo
*ninixsomosi
*ninoigmo
2nd plural
*nigyetesi
*nigyestē
*ninixsetesi
*ninoixte
3rd plural
*nigyonti
*nigyento
*ninixsonti
*ninoigars
Pres. subjunctive
Past subjunctive
Imperative
1st singular
*neixsū
?
—
2nd singular
*neixsesi
?
*nigye
3rd singular
*neixseti
?
*nigyetou
1st plural
*neixsomosi
?
*nigyomos
2nd plural
*neixsetesi
?
*nigyete
3rd plural
*neixsonti
?
*nigyontou
Passive voice
Present
Imperfect
Future
Preterite
1st singular
*nigyūr
—
*ninixsūr
*ninoigra
2nd singular
*nigyetar
—
*ninixsetar
*ninoigras?
3rd singular
*nigyetor
?
*ninixsetor
*ninoigre
1st plural
*nigyommor
—
*ninixsommor
?
2nd plural
*nigyedwe
—
*ninixsedwe
?
3rd plural
*nigyontor
?
*ninixsontor
?
Pres. subjunctive
Past subjunctive
Imperative
1st singular
*neixsūr
—
—
2nd singular
*neixsetar
—
—
3rd singular
*neixsetor
—
—
1st plural
*neixsommor
—
—
2nd plural
*neixsedwe
—
—
3rd plural
*neixsontor
—
—
Declension of the present participle
masculine
singular
dual
plural
nominative
*nigyonts
*nigyonte
*nigyontes
vocative
*nigyonts
*nigyonte
*nigyontes
accusative
*nigyontam
*nigyonte
*nigyontans
genitive
*nigyantos
*?
*nigyantom
dative
*nigyantei
*nigyantbom
*nigyantbos
instrumental
*nigyantī?
*nigyantbim
*nigyantbis
feminine
singular
dual
plural
nominative
*nigyantī
*nigyantī
*nigyantiyās
vocative
*nigyantī
*nigyantī
*nigyantiyās
accusative
*nigyantīm
*nigyantī
*nigyantiyans
genitive
*nigyantyās
*?
*nigyantyom
dative
*nigyantyāi
*nigyantyābom
*nigyantyābos
instrumental
*?
*nigyantyābim
*nigyantyābis
neuter
singular
dual
plural
nominative
*nigyont
*?
*nigyonta
vocative
*nigyont
*?
*nigyonta
accusative
*nigyont
*?
*nigyonta
genitive
*nigyantos
*?
*nigyantom
dative
*nigyantei
*?
*nigyantbos
instrumental
*nigyantī?
*?
*nigyantbis
Declension of the middle participle
masculine
singular
dual
plural
nominative
*nigyomnos
*nigyomnou
*nigyomnoi
vocative
*nigyomne
*nigyomnou
*nigyomnoi
accusative
*nigyomnom
*nigyomnou
*nigyomnons
genitive
*nigyomnī
*nigyomnous
*nigyomnom
dative
*nigyomnūi
*nigyomnobom
*nigyomnobos
instrumental
*nigyomnū
*nigyomnobim
*nigyomnobis
feminine
singular
dual
plural
nominative
*nigyomnā
*nigyomnai
*nigyomnās
vocative
*nigyomnā
*nigyomnai
*nigyomnās
accusative
*nigyomnam
*nigyomnai
*nigyomnans
genitive
*nigyomnās
*nigyomnous
*nigyomnom
dative
*nigyomnai
*nigyomnābom
*nigyomnābos
instrumental
*?
*nigyomnābim
*nigyomnābis
neuter
singular
dual
plural
nominative
*nigyomnom
*nigyomnou
*nigyomnā
vocative
*nigyomnom
*nigyomnou
*nigyomnā
accusative
*nigyomnom
*nigyomnou
*nigyomnā
genitive
*nigyomnī
*nigyomnous
*nigyomnom
dative
*nigyomnūi
*nigyomnobom
*nigyomnobos
instrumental
*nigyomnū
*nigyomnobim
*nigyomnobis
Declension of the past participle
masculine
singular
dual
plural
nominative
*nixtos
*nixtou
*nixtoi
vocative
*nixte
*nixtou
*nixtoi
accusative
*nixtom
*nixtou
*nixtons
genitive
*nixtī
*nixtous
*nixtom
dative
*nixtūi
*nixtobom
*nixtobos
instrumental
*nixtū
*nixtobim
*nixtobis
feminine
singular
dual
plural
nominative
*nixtā
*nixtai
*nixtās
vocative
*nixtā
*nixtai
*nixtās
accusative
*nixtam
*nixtai
*nixtans
genitive
*nixtās
*nixtous
*nixtom
dative
*nixtai
*nixtābom
*nixtābos
instrumental
*?
*nixtābim
*nixtābis
neuter
singular
dual
plural
nominative
*nixtom
*nixtou
*nixtā
vocative
*nixtom
*nixtou
*nixtā
accusative
*nixtom
*nixtou
*nixtā
genitive
*nixtī
*nixtous
*nixtom
dative
*nixtūi
*nixtobom
*nixtobos
instrumental
*nixtū
*nixtobim
*nixtobis
^ Schumacher, Stefan, Schulze-Thulin, Britta (2004 ) Die keltischen Primärverben: ein vergleichendes, etymologisches und morphologisches Lexikon [The Celtic Primary Verbs: A comparative, etymological and morphological lexicon ] (Innsbrucker Beiträge zur Sprachwissenschaft; 110 ) (in German), Innsbruck: Institut für Sprachen und Literaturen der Universität Innsbruck, →ISBN , pages 492-496