Probably from Proto-Slavic *košь (“basket”).[1] According to UEW, from Proto-Uralic *koća.[2]
| Inflection of kosio (Kotus type 3/valtio, no gradation) | |||
|---|---|---|---|
| nominative | kosio | kosiot | |
| genitive | kosion | kosioiden kosioitten | |
| partitive | kosiota | kosioita | |
| illative | kosioon | kosioihin | |
| singular | plural | ||
| nominative | kosio | kosiot | |
| accusative | nom. | kosio | kosiot |
| gen. | kosion | ||
| genitive | kosion | kosioiden kosioitten | |
| partitive | kosiota | kosioita | |
| inessive | kosiossa | kosioissa | |
| elative | kosiosta | kosioista | |
| illative | kosioon | kosioihin | |
| adessive | kosiolla | kosioilla | |
| ablative | kosiolta | kosioilta | |
| allative | kosiolle | kosioille | |
| essive | kosiona | kosioina | |
| translative | kosioksi | kosioiksi | |
| abessive | kosiotta | kosioitta | |
| instructive | — | kosioin | |
| comitative | See the possessive forms below. | ||
kosio (Cyrillic spelling косио)