Per Derksen, probably from an earlier *kopsъ, related to Ancient Greek κόψιχος (kópsikhos), κόσσυφος (kóssuphos), although the variation in the Greek forms suggests a pre-Greek substratum word.
Continues Proto-Indo-European *kosós (possibly Proto-Indo-European *kosús, based on the doublet *kosvenъ), from Proto-Indo-European *kes- (“to scratch”) or depalatalized Proto-Indo-European *ḱes- (“to castrate, to prune”).
singular | masculine | feminine | neuter |
---|---|---|---|
nominative | *kosъ | *kosa | *koso |
genitive | *kosa | *kosy | *kosa |
dative | *kosu | *kosě | *kosu |
accusative | *kosъ | *kosǫ | *koso |
instrumental | *kosomь | *kosojǫ | *kosomь |
locative | *kosě | *kosě | *kosě |
vocative | *kose | *koso | *koso |
dual | masculine | feminine | neuter |
nominative | *kosa | *kosě | *kosě |
genitive | *kosu | *kosu | *kosu |
dative | *kosoma | *kosama | *kosoma |
accusative | *kosa | *kosě | *kosě |
instrumental | *kosoma | *kosama | *kosoma |
locative | *kosu | *kosu | *kosu |
vocative | *kosa | *kosě | *kosě |
plural | masculine | feminine | neuter |
nominative | *kosi | *kosy | *kosa |
genitive | *kosъ | *kosъ | *kosъ |
dative | *kosomъ | *kosamъ | *kosomъ |
accusative | *kosy | *kosy | *kosa |
instrumental | *kosy | *kosami | *kosy |
locative | *kosěxъ | *kosaxъ | *kosěxъ |
vocative | *kosi | *kosy | *kosa |
singular | masculine | feminine | neuter |
---|---|---|---|
nominative | *kosъjь | *kosaja | *kosoje |
genitive | *kosajego | *kosyję̇ | *kosajego |
dative | *kosujemu | *kosěji | *kosujemu |
accusative | *kosъjь | *kosǫjǫ | *kosoje |
instrumental | *kosyjimь | *kosǫjǫ | *kosyjimь |
locative | *kosějemь | *kosěji | *kosějemь |
vocative | *kosъjь | *kosaja | *kosoje |
dual | masculine | feminine | neuter |
nominative | *kosaja | *kosěji | *kosěji |
genitive | *kosuju | *kosuju | *kosuju |
dative | *kosyjima | *kosyjima | *kosyjima |
accusative | *kosaja | *kosěji | *kosěji |
instrumental | *kosyjima | *kosyjima | *kosyjima |
locative | *kosuju | *kosuju | *kosuju |
vocative | *kosaja | *kosěji | *kosěji |
plural | masculine | feminine | neuter |
nominative | *kosiji | *kosyję̇ | *kosaja |
genitive | *kosъjixъ | *kosъjixъ | *kosъjixъ |
dative | *kosyjimъ | *kosyjimъ | *kosyjimъ |
accusative | *kosyję̇ | *kosyję̇ | *kosaja |
instrumental | *kosyjimi | *kosyjimi | *kosyjimi |
locative | *kosyjixъ | *kosyjixъ | *kosyjixъ |
vocative | *kosiji | *kosyję̇ | *kosaja |