Borrowed from Proto-Norse , from Proto-Germanic *skaidaz; compare Swedish skede (“span of time”). No cognates are found in other Baltic-Finnic languages. The original meaning "forest clearing, mound at swamp; treeless area" can still be seen in the term keidassuo. The sense of "oasis" is an academic adaptation from the late 19th century.
keidas
| Inflection of keidas (Kotus type 41*F/vieras, t-d gradation) | |||
|---|---|---|---|
| nominative | keidas | keitaat | |
| genitive | keitaan | keitaiden keitaitten | |
| partitive | keidasta | keitaita | |
| illative | keitaaseen | keitaisiin | |
| singular | plural | ||
| nominative | keidas | keitaat | |
| accusative | nom. | keidas | keitaat |
| gen. | keitaan | ||
| genitive | keitaan | keitaiden keitaitten keidasten rare | |
| partitive | keidasta | keitaita | |
| inessive | keitaassa | keitaissa | |
| elative | keitaasta | keitaista | |
| illative | keitaaseen | keitaisiin keitaihin rare | |
| adessive | keitaalla | keitailla | |
| ablative | keitaalta | keitailta | |
| allative | keitaalle | keitaille | |
| essive | keitaana | keitaina | |
| translative | keitaaksi | keitaiksi | |
| abessive | keitaatta | keitaitta | |
| instructive | — | keitain | |
| comitative | See the possessive forms below. | ||