Deklinationen
| Singular | Plural | |
|---|---|---|
| Nominativ | singular sg aeternum | plural pl aeterna |
| Genitiv | singular sg aeternī | plural pl aeternōrum |
| Dativ | singular sg aeternō | plural pl aeternīs |
| Akkusativ | singular sg aeternum | plural pl aeterna |
| Ablativ | singular sg aeternō | plural pl aeternīs |
| Vokativ | singular sg aeternum | plural pl aeterna |