Unknown; the traditional derivation from Proto-Indo-European *dóru (“tree; firm”) is doubtful. The u of the Welsh word is unexpected, as Proto-Celtic *ū becomes *i in Proto-Brythonic and i in Welsh (compare Proto-Celtic *dūnom > Welsh din). It is possible the Welsh word was influenced by Gaulish or Goidelic, or is a loanword from one of them; foreign /uː/ is usually rendered as u when loaned into Welsh.
*drūtos
O/ā-stem | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *drūtos | *drūtou | *drūtoi |
vocative | *drūte | *drūtou | *drūtoi |
accusative | *drūtom | *drūtou | *drūtoms |
genitive | *drūtī | *drūtous | *drūtom |
dative | *drūtūi | *drūtobom | *drūtobos |
instrumental | *drūtū | *drūtobim | *drūtobis |
feminine | singular | dual | plural |
nominative | *drūtā | *drūtai | *drūtās |
vocative | *drūtā | *drūtai | *drūtās |
accusative | *drūtam | *drūtai | *drūtams |
genitive | *drūtās | *drūtous | *drūtom |
dative | *drūtai | *drūtābom | *drūtābos |
instrumental | *? | *drūtābim | *drūtābis |
neuter | singular | dual | plural |
nominative | *drūtom | *drūtou | *drūtā |
vocative | *drūtom | *drūtou | *drūtā |
accusative | *drūtom | *drūtou | *drūtā |
genitive | *drūtī | *drūtous | *drūtom |
dative | *drūtūi | *drūtobom | *drūtobos |
instrumental | *drūtū | *drūtobim | *drūtobis |
Declension of the comparative | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *drūtyūs | *? | *drūtyoses |
vocative | *drūtyūs | *? | *drūtyoses |
accusative | *drūtyosam | *? | *drūtyosams |
genitive | *drūtisos | *? | *drūtisom |
dative | *drūtisei | *? | *drūtisbos |
instrumental | *drūtisī | *? | *drūtisbis |
feminine | singular | dual | plural |
nominative | *drūtyūs | *? | *drūtyoses |
vocative | *drūtyūs | *? | *drūtyoses |
accusative | *drūtyosam | *? | *drūtyosams |
genitive | *drūtisos | *? | *drūtisom |
dative | *drūtisei | *? | *drūtisbos |
instrumental | *drūtisī | *? | *drūtisbis |
neuter | singular | dual | plural |
nominative | *drūtis | *? | *? |
vocative | *drūtis | *? | *? |
accusative | *drūtis | *? | *? |
genitive | *drūtisos | *? | *drūtisom |
dative | *drūtisei | *? | *drūtisbos |
instrumental | *drūtisī | *? | *drūtisbis |