Inherited from Proto-Slavic *kъjь (“which”), from *kъ (“who”) + *jь (“this”), derived from Proto-Balto-Slavic *kas, from Proto-Indo-European *kʷós (“who”). First attested in c. 1140‒1160. By surface analysis, *ке (*ke) + и (i). Cognate with Old East Slavic къи (kŷi), кꙑи (kyi), Old Ruthenian кой (koj), кїй (kij), Old Church Slavonic кꙑи (kyi), Old Polish ki, Old Czech ký.
кеи • (kei)
singular | dual | plural | |||||||
---|---|---|---|---|---|---|---|---|---|
masculine | neuter | feminine | masculine | neuter | feminine | masculine | neuter | feminine | |
nominative | кеь keĭ |
кее keje |
кеа kea |
кеа kea |
кеи kei |
кеи kei |
кеа kea |
кеѣ kejě | |
genitive | кеего kejego |
кееѣ kejejě |
кеею kejeju |
кеихъ keixŭ | |||||
dative | кеемоу kejemu |
кееи kejei |
кеима keima |
кеимъ keimŭ | |||||
accusative | кеь keĭ |
кее keje |
кеѫ keǫ |
кеа kea |
кеи kei |
кеѣ kejě |
кеа kea |
кеѣ kejě | |
instrumental | кеимь keimĭ |
кееѭ kejejǫ |
кеима keima |
кеими keimi | |||||
locative | кеемь kejemĭ |
кееи kejei |
кеею kejeju |
кеихъ keixŭ |