From Proto-Indo-European *-kos, *-ḱos with the thematic vowel of *i-stems. Cognate with Latin -icus, Ancient Greek -ικός (-ikós), Proto-Germanic *-igaz.
*-ikos
O/ā-stem | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *-ikos | *-ikou | *-ikoi |
vocative | *-ike | *-ikou | *-ikoi |
accusative | *-ikom | *-ikou | *-ikons |
genitive | *-ikī | *-ikous | *-ikom |
dative | *-ikūi | *-ikobom | *-ikobos |
instrumental | *-ikū | *-ikobim | *-ikobis |
feminine | singular | dual | plural |
nominative | *-ikā | *-ikai | *-ikās |
vocative | *-ikā | *-ikai | *-ikās |
accusative | *-ikam | *-ikai | *-ikans |
genitive | *-ikās | *-ikous | *-ikom |
dative | *-ikai | *-ikābom | *-ikābos |
instrumental | *? | *-ikābim | *-ikābis |
neuter | singular | dual | plural |
nominative | *-ikom | *-ikou | *-ikā |
vocative | *-ikom | *-ikou | *-ikā |
accusative | *-ikom | *-ikou | *-ikā |
genitive | *-ikī | *-ikous | *-ikom |
dative | *-ikūi | *-ikobom | *-ikobos |
instrumental | *-ikū | *-ikobim | *-ikobis |
Declension of the comparative | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *-ikyūs | *? | *-ikyoses |
vocative | *-ikyūs | *? | *-ikyoses |
accusative | *-ikyosam | *? | *-ikyosans |
genitive | *-ikisos | *? | *-ikisom |
dative | *-ikisei | *? | *-ikisbos |
instrumental | *-ikisī | *? | *-ikisbis |
feminine | singular | dual | plural |
nominative | *-ikyūs | *? | *-ikyoses |
vocative | *-ikyūs | *? | *-ikyoses |
accusative | *-ikyosam | *? | *-ikyosans |
genitive | *-ikisos | *? | *-ikisom |
dative | *-ikisei | *? | *-ikisbos |
instrumental | *-ikisī | *? | *-ikisbis |
neuter | singular | dual | plural |
nominative | *-ikis | *? | *? |
vocative | *-ikis | *? | *? |
accusative | *-ikis | *? | *? |
genitive | *-ikisos | *? | *-ikisom |
dative | *-ikisei | *? | *-ikisbos |
instrumental | *-ikisī | *? | *-ikisbis |