Etymology and reconstruction are difficult, not only due to the geminate -kk-, but also due to the inconsistent vowel between Old Irish ícc and the other Celtic words. All etymologies struggle with at least one of these two problems. A small catalogue of etymologies include:[1]
*yekkos
O/ā-stem | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *yakkos | *yakkou | *yakkoi |
vocative | *yakke | *yakkou | *yakkoi |
accusative | *yakkom | *yakkou | *yakkons |
genitive | *yakkī | *yakkous | *yakkom |
dative | *yakkūi | *yakkobom | *yakkobos |
instrumental | *yakkū | *yakkobim | *yakkobis |
feminine | singular | dual | plural |
nominative | *yakkā | *yakkai | *yakkās |
vocative | *yakkā | *yakkai | *yakkās |
accusative | *yakkam | *yakkai | *yakkans |
genitive | *yakkās | *yakkous | *yakkom |
dative | *yakkai | *yakkābom | *yakkābos |
instrumental | *? | *yakkābim | *yakkābis |
neuter | singular | dual | plural |
nominative | *yakkom | *yakkou | *yakkā |
vocative | *yakkom | *yakkou | *yakkā |
accusative | *yakkom | *yakkou | *yakkā |
genitive | *yakkī | *yakkous | *yakkom |
dative | *yakkūi | *yakkobom | *yakkobos |
instrumental | *yakkū | *yakkobim | *yakkobis |
Declension of the comparative | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *yakkyūs | *? | *yakkyoses |
vocative | *yakkyūs | *? | *yakkyoses |
accusative | *yakkyosam | *? | *yakkyosans |
genitive | *yakkisos | *? | *yakkisom |
dative | *yakkisei | *? | *yakkisbos |
instrumental | *yakkisī | *? | *yakkisbis |
feminine | singular | dual | plural |
nominative | *yakkyūs | *? | *yakkyoses |
vocative | *yakkyūs | *? | *yakkyoses |
accusative | *yakkyosam | *? | *yakkyosans |
genitive | *yakkisos | *? | *yakkisom |
dative | *yakkisei | *? | *yakkisbos |
instrumental | *yakkisī | *? | *yakkisbis |
neuter | singular | dual | plural |
nominative | *yakkis | *? | *? |
vocative | *yakkis | *? | *? |
accusative | *yakkis | *? | *? |
genitive | *yakkisos | *? | *yakkisom |
dative | *yakkisei | *? | *yakkisbos |
instrumental | *yakkisī | *? | *yakkisbis |