From Proto-Finnic *aivas. Cognates include dialectal Finnish aivas and dialectal Estonian aevas.
aivas
| Declension of aivas (type 2/patsas, no gradation) | ||
|---|---|---|
| singular | plural | |
| nominative | aivas | aivaat |
| genitive | aivaan | aivain |
| partitive | aivasta, aivast | aivaita, aivaja |
| illative | aivaasse | aivaisse |
| inessive | aivaas | aivais |
| elative | aivaast | aivaist |
| allative | aivaalle | aivaille |
| adessive | aivaal | aivail |
| ablative | aivaalt | aivailt |
| translative | aivaaks | aivaiks |
| essive | aivaanna, aivaan | aivainna, aivain |
| exessive1) | aivaant | aivaint |
| 1) obsolete *) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the comitative is formed by adding the suffix -ka? or -kä? to the genitive. | ||
| Declension of aivas (type 2/petos, no gradation) | ||
|---|---|---|
| singular | plural | |
| nominative | aivas | aivakset |
| genitive | aivaksen | aivaksiin |
| partitive | aivasta, aivast | aivaksia |
| illative | aivaksee | aivaksii |
| inessive | aivaksees | aivaksiis |
| elative | aivaksest | aivaksist |
| allative | aivakselle | aivaksille |
| adessive | aivakseel | aivaksiil |
| ablative | aivakselt | aivaksilt |
| translative | aivakseks | aivaksiks |
| essive | aivaksenna, aivakseen | aivaksinna, aivaksiin |
| exessive1) | aivaksent | aivaksint |
| 1) obsolete *) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the comitative is formed by adding the suffix -ka? or -kä? to the genitive. | ||