From Proto-Balto-Slavic *arwis. Morphologically from *orvò + *-ьnъ. According to Pokorny (supported by Snoj), ultimately from Proto-Indo-European *rewh₁- (“open space, field”), see also English room, Middle Irish róe.
Cognates include Old Prussian arwis (“true, definite”), Lithuanian arvis (“suitable”) (or arvas, then displaced by tinka).
singular | masculine | feminine | neuter |
---|---|---|---|
nominative | *orvьnъ | *orvьna | *orvьno |
genitive | *orvьna | *orvьny | *orvьna |
dative | *orvьnu | *orvьně | *orvьnu |
accusative | *orvьnъ | *orvьnǫ | *orvьno |
instrumental | *orvьnomь | *orvьnojǫ | *orvьnomь |
locative | *orvьně | *orvьně | *orvьně |
vocative | *orvьne | *orvьno | *orvьno |
dual | masculine | feminine | neuter |
nominative | *orvьna | *orvьně | *orvьně |
genitive | *orvьnu | *orvьnu | *orvьnu |
dative | *orvьnoma | *orvьnama | *orvьnoma |
accusative | *orvьna | *orvьně | *orvьně |
instrumental | *orvьnoma | *orvьnama | *orvьnoma |
locative | *orvьnu | *orvьnu | *orvьnu |
vocative | *orvьna | *orvьně | *orvьně |
plural | masculine | feminine | neuter |
nominative | *orvьni | *orvьny | *orvьna |
genitive | *orvьnъ | *orvьnъ | *orvьnъ |
dative | *orvьnomъ | *orvьnamъ | *orvьnomъ |
accusative | *orvьny | *orvьny | *orvьna |
instrumental | *orvьny | *orvьnami | *orvьny |
locative | *orvьněxъ | *orvьnaxъ | *orvьněxъ |
vocative | *orvьni | *orvьny | *orvьna |