出典:Wiktionary
Second-declension noun (neuter).
| Case | Singular | Plural |
|---|---|---|
| Nominative | opertōrium | opertōria |
| Genitive | opertōriī opertōrī1 |
opertōriōrum |
| Dative | opertōriō | opertōriīs |
| Accusative | opertōrium | opertōria |
| Ablative | opertōriō | opertōriīs |
| Vocative | opertōrium | opertōria |