From Proto-Finnic *arkku, borrowed from Proto-Norse *ᚨᚱᚲᚢ (*arku) (compare Proto-Germanic *arkō and Old Norse ǫrk), from Latin arca.
arkku
| Inflection of arkku (Kotus type 1*A/valo, kk-k gradation) | ||||
|---|---|---|---|---|
| nominative | arkku | arkut | ||
| genitive | arkun | arkkujen | ||
| partitive | arkkua | arkkuja | ||
| illative | arkkuun | arkkuihin | ||
| singular | plural | |||
| nominative | arkku | arkut | ||
| accusative | nom. | arkku | arkut | |
| gen. | arkun | |||
| genitive | arkun | arkkujen | ||
| partitive | arkkua | arkkuja | ||
| inessive | arkussa | arkuissa | ||
| elative | arkusta | arkuista | ||
| illative | arkkuun | arkkuihin | ||
| adessive | arkulla | arkuilla | ||
| ablative | arkulta | arkuilta | ||
| allative | arkulle | arkuille | ||
| essive | arkkuna | arkkuina | ||
| translative | arkuksi | arkuiksi | ||
| abessive | arkutta | arkuitta | ||
| instructive | — | arkuin | ||
| comitative | See the possessive forms below. | |||