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From Proto-Indo-European *skek- , whence also Proto-Germanic *skehaną and Proto-Slavic *skočiti .[ 1]
*skokīti
to move , stir
There were two related verbs, a weak verb *skokīti and a strong verb *skeketi .[ 2] In Old Irish, the present stem of the strong verb fell out of use but the rest of the paradigm, like the subjunctive and preterite, remained.
Ī-present
Active voice
Present
Imperfect
Future
Preterite
1st singular
*skokeyū
*skokīmam
?
—
2nd singular
*skokīsi
*skokītās
?
—
3rd singular
*skokīti
*skokīto
?
—
1st plural
*skokeyomosi
*skokīmo
?
—
2nd plural
*skokītesi
*skokīstē
?
—
3rd plural
*skokeyonti
*skokīnto
?
—
Pres. subjunctive
Past subjunctive
Imperative
1st singular
?
?
—
2nd singular
?
?
*skokī
3rd singular
?
?
*skokītou
1st plural
?
?
*skokeyomos
2nd plural
?
?
*skokīte
3rd plural
?
?
*skokeyontou
Passive voice
Present
Imperfect
Future
Preterite
1st singular
*skokeyūr
—
?
—
2nd singular
*skokītar
—
?
—
3rd singular
*skokītor
?
?
—
1st plural
*skokeyommor
—
?
—
2nd plural
*skokīdwe
—
?
—
3rd plural
*skokeyontor
?
?
—
Pres. subjunctive
Past subjunctive
Imperative
1st singular
?
—
—
2nd singular
?
—
—
3rd singular
?
—
—
1st plural
?
—
—
2nd plural
?
—
—
3rd plural
?
—
—
Declension of the present participle
masculine
singular
dual
plural
nominative
*skokeyonts
*skokeyonte
*skokeyontes
vocative
*skokeyonts
*skokeyonte
*skokeyontes
accusative
*skokeyontam
*skokeyonte
*skokeyontans
genitive
*skokeyantos
*?
*skokeyantom
dative
*skokeyantei
*skokeyantbom
*skokeyantbos
instrumental
*skokeyantī?
*skokeyantbim
*skokeyantbis
feminine
singular
dual
plural
nominative
*skokeyantī
*skokeyantī
*skokeyantiyās
vocative
*skokeyantī
*skokeyantī
*skokeyantiyās
accusative
*skokeyantīm
*skokeyantī
*skokeyantiyans
genitive
*skokeyantyās
*?
*skokeyantyom
dative
*skokeyantyāi
*skokeyantyābom
*skokeyantyābos
instrumental
*?
*skokeyantyābim
*skokeyantyābis
neuter
singular
dual
plural
nominative
*skokeyont
*?
*skokeyonta
vocative
*skokeyont
*?
*skokeyonta
accusative
*skokeyont
*?
*skokeyonta
genitive
*skokeyantos
*?
*skokeyantom
dative
*skokeyantei
*?
*skokeyantbos
instrumental
*skokeyantī?
*?
*skokeyantbis
Declension of the middle participle
masculine
singular
dual
plural
nominative
*skokeyomnos
*skokeyomnou
*skokeyomnoi
vocative
*skokeyomne
*skokeyomnou
*skokeyomnoi
accusative
*skokeyomnom
*skokeyomnou
*skokeyomnons
genitive
*skokeyomnī
*skokeyomnous
*skokeyomnom
dative
*skokeyomnūi
*skokeyomnobom
*skokeyomnobos
instrumental
*skokeyomnū
*skokeyomnobim
*skokeyomnobis
feminine
singular
dual
plural
nominative
*skokeyomnā
*skokeyomnai
*skokeyomnās
vocative
*skokeyomnā
*skokeyomnai
*skokeyomnās
accusative
*skokeyomnam
*skokeyomnai
*skokeyomnans
genitive
*skokeyomnās
*skokeyomnous
*skokeyomnom
dative
*skokeyomnai
*skokeyomnābom
*skokeyomnābos
instrumental
*?
*skokeyomnābim
*skokeyomnābis
neuter
singular
dual
plural
nominative
*skokeyomnom
*skokeyomnou
*skokeyomnā
vocative
*skokeyomnom
*skokeyomnou
*skokeyomnā
accusative
*skokeyomnom
*skokeyomnou
*skokeyomnā
genitive
*skokeyomnī
*skokeyomnous
*skokeyomnom
dative
*skokeyomnūi
*skokeyomnobom
*skokeyomnobos
instrumental
*skokeyomnū
*skokeyomnobim
*skokeyomnobis
Thematic present, suffixless preterite
Active voice
Present
Imperfect
Future
Preterite
1st singular
*skekū
*skekemam
?
*skāka
2nd singular
*skekesi
*skeketās
?
*skākas?
3rd singular
*skeketi
*skeketo
?
*skāke
1st plural
*skekomosi
*skekemo
?
*skākmo
2nd plural
*skeketesi
*skekestē
?
*skāxte
3rd plural
*skekonti
*skekento
?
*skākars
Pres. subjunctive
Past subjunctive
Imperative
1st singular
*skexsū
?
—
2nd singular
*skexsesi
?
*skeke
3rd singular
*skexseti
?
*skeketou
1st plural
*skexsomosi
?
*skekomos
2nd plural
*skexsetesi
?
*skekete
3rd plural
*skexsonti
?
*skekontou
Passive voice
Present
Imperfect
Future
Preterite
1st singular
*skekūr
—
?
*skākra
2nd singular
*skeketar
—
?
*skākras?
3rd singular
*skeketor
?
?
*skākre
1st plural
*skekommor
—
?
?
2nd plural
*skekedwe
—
?
?
3rd plural
*skekontor
?
?
?
Pres. subjunctive
Past subjunctive
Imperative
1st singular
*skexsūr
—
—
2nd singular
*skexsetar
—
—
3rd singular
*skexsetor
—
—
1st plural
*skexsommor
—
—
2nd plural
*skexsedwe
—
—
3rd plural
*skexsontor
—
—
Declension of the present participle
masculine
singular
dual
plural
nominative
*skekonts
*skekonte
*skekontes
vocative
*skekonts
*skekonte
*skekontes
accusative
*skekontam
*skekonte
*skekontans
genitive
*skekantos
*?
*skekantom
dative
*skekantei
*skekantbom
*skekantbos
instrumental
*skekantī?
*skekantbim
*skekantbis
feminine
singular
dual
plural
nominative
*skekantī
*skekantī
*skekantiyās
vocative
*skekantī
*skekantī
*skekantiyās
accusative
*skekantīm
*skekantī
*skekantiyans
genitive
*skekantyās
*?
*skekantyom
dative
*skekantyāi
*skekantyābom
*skekantyābos
instrumental
*?
*skekantyābim
*skekantyābis
neuter
singular
dual
plural
nominative
*skekont
*?
*skekonta
vocative
*skekont
*?
*skekonta
accusative
*skekont
*?
*skekonta
genitive
*skekantos
*?
*skekantom
dative
*skekantei
*?
*skekantbos
instrumental
*skekantī?
*?
*skekantbis
Declension of the middle participle
masculine
singular
dual
plural
nominative
*skekomnos
*skekomnou
*skekomnoi
vocative
*skekomne
*skekomnou
*skekomnoi
accusative
*skekomnom
*skekomnou
*skekomnons
genitive
*skekomnī
*skekomnous
*skekomnom
dative
*skekomnūi
*skekomnobom
*skekomnobos
instrumental
*skekomnū
*skekomnobim
*skekomnobis
feminine
singular
dual
plural
nominative
*skekomnā
*skekomnai
*skekomnās
vocative
*skekomnā
*skekomnai
*skekomnās
accusative
*skekomnam
*skekomnai
*skekomnans
genitive
*skekomnās
*skekomnous
*skekomnom
dative
*skekomnai
*skekomnābom
*skekomnābos
instrumental
*?
*skekomnābim
*skekomnābis
neuter
singular
dual
plural
nominative
*skekomnom
*skekomnou
*skekomnā
vocative
*skekomnom
*skekomnou
*skekomnā
accusative
*skekomnom
*skekomnou
*skekomnā
genitive
*skekomnī
*skekomnous
*skekomnom
dative
*skekomnūi
*skekomnobom
*skekomnobos
instrumental
*skekomnū
*skekomnobim
*skekomnobis
*dī-skokīti
*kom-uss-skokīti
*to-ɸro-uss-skokīti
^ Matasović, Ranko (2009 ) “*skek-”, in Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill , →ISBN , page 341
^ 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 , page 380