| Operkulum | Nominativ, Singular | nominative case, singular | |
| Operkulum | Genitiv, Singular | genitive case, singular | |
| Operkulum | Dativ, Singular | dative case, singular | |
| Operkulum | Akkusativ, Singular | accusative case, singular | |
| Operkulumen | Nominativ, Plural | nominative case, plural | |
| Operkulumen | Genitiv, Plural | genitive case, plural | |
| Operkulumen | Dativ, Plural | dative case, plural | |
| Operkulumen | Akkusativ, Plural | accusative case, plural |