| Nominative | arenal |
| Genitive | arenalu |
| Dative | arenalowi |
| Accusative | arenal |
| Instrumental | arenalem |
| Locative | arenalu |
| Vocative | arenalu |
| Nominative | arenale |
| Genitive | arenalów; arenali |
| Dative | arenalom |
| Accusative | arenale |
| Instrumental | arenalami |
| Locative | arenalach |
| Vocative | arenale |