Deklinationen
| Singular | Plural | |
|---|---|---|
| Nominativ | singular sg arcānum | plural pl arcāna |
| Genitiv | singular sg arcānī | plural pl arcānōrum |
| Dativ | singular sg arcānō | plural pl arcānīs |
| Akkusativ | singular sg arcānum | plural pl arcāna |
| Ablativ | singular sg arcānō | plural pl arcānīs |
| Vokativ | singular sg arcānum | plural pl arcāna |
