Uncertain, as Proto-Indo-European *kes- (“to comb”) would yield an expected *ksto; perhaps through an intermediary *kasto-.
*kassos[1]
O/ā-stem | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *kassos | *kassou | *kassoi |
vocative | *kasse | *kassou | *kassoi |
accusative | *kassom | *kassou | *kassoms |
genitive | *kassī | *kassous | *kassom |
dative | *kassūi | *kassobom | *kassobos |
instrumental | *kassū | *kassobim | *kassobis |
feminine | singular | dual | plural |
nominative | *kassā | *kassai | *kassās |
vocative | *kassā | *kassai | *kassās |
accusative | *kassam | *kassai | *kassams |
genitive | *kassās | *kassous | *kassom |
dative | *kassai | *kassābom | *kassābos |
instrumental | *? | *kassābim | *kassābis |
neuter | singular | dual | plural |
nominative | *kassom | *kassou | *kassā |
vocative | *kassom | *kassou | *kassā |
accusative | *kassom | *kassou | *kassā |
genitive | *kassī | *kassous | *kassom |
dative | *kassūi | *kassobom | *kassobos |
instrumental | *kassū | *kassobim | *kassobis |