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Unknown. Matasović notes a possible connection to Proto-Indo-European *deh₁- ( “ to bind ” ) , but dismisses it as semantically unsatisfactory.[ 1]
*dāyetor [ 1] [ 2]
to trouble
Thematic present, deponent
Passive voice
Present
Imperfect
Future
Preterite
1st singular
*dāyūr
—
?
—
2nd singular
*dāyetar
—
?
—
3rd singular
*dāyetor
?
?
—
1st plural
*dāyommor
—
?
—
2nd plural
*dāyedwe
—
?
—
3rd plural
*dāyontor
?
?
—
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
*dāyonts
*dāyonte
*dāyontes
vocative
*dāyonts
*dāyonte
*dāyontes
accusative
*dāyontam
*dāyonte
*dāyontans
genitive
*dāyantos
*?
*dāyantom
dative
*dāyantei
*dāyantbom
*dāyantbos
instrumental
*dāyantī?
*dāyantbim
*dāyantbis
feminine
singular
dual
plural
nominative
*dāyantī
*dāyantī
*dāyantiyās
vocative
*dāyantī
*dāyantī
*dāyantiyās
accusative
*dāyantīm
*dāyantī
*dāyantiyans
genitive
*dāyantyās
*?
*dāyantyom
dative
*dāyantyāi
*dāyantyābom
*dāyantyābos
instrumental
*?
*dāyantyābim
*dāyantyābis
neuter
singular
dual
plural
nominative
*dāyont
*?
*dāyonta
vocative
*dāyont
*?
*dāyonta
accusative
*dāyont
*?
*dāyonta
genitive
*dāyantos
*?
*dāyantom
dative
*dāyantei
*?
*dāyantbos
instrumental
*dāyantī?
*?
*dāyantbis
Declension of the middle participle
masculine
singular
dual
plural
nominative
*dāyomnos
*dāyomnou
*dāyomnoi
vocative
*dāyomne
*dāyomnou
*dāyomnoi
accusative
*dāyomnom
*dāyomnou
*dāyomnons
genitive
*dāyomnī
*dāyomnous
*dāyomnom
dative
*dāyomnūi
*dāyomnobom
*dāyomnobos
instrumental
*dāyomnū
*dāyomnobim
*dāyomnobis
feminine
singular
dual
plural
nominative
*dāyomnā
*dāyomnai
*dāyomnās
vocative
*dāyomnā
*dāyomnai
*dāyomnās
accusative
*dāyomnam
*dāyomnai
*dāyomnans
genitive
*dāyomnās
*dāyomnous
*dāyomnom
dative
*dāyomnai
*dāyomnābom
*dāyomnābos
instrumental
*?
*dāyomnābim
*dāyomnābis
neuter
singular
dual
plural
nominative
*dāyomnom
*dāyomnou
*dāyomnā
vocative
*dāyomnom
*dāyomnou
*dāyomnā
accusative
*dāyomnom
*dāyomnou
*dāyomnā
genitive
*dāyomnī
*dāyomnous
*dāyomnom
dative
*dāyomnūi
*dāyomnobom
*dāyomnobos
instrumental
*dāyomnū
*dāyomnobim
*dāyomnobis
Proto-Brythonic: *dọr
Middle Breton: deur ( present tense )
Middle Welsh: doraf ( 1sg present ) , dawr ( 3sg present )
Old Irish: dáthar , dáas ( confused with at·tá ( “ to exist ” ) )
↑ 1.0 1.1 Matasović, Ranko (2009 ) “*dā-yo-”, in Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill , →ISBN , page 93
^ 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 267