出典:Wiktionary
From observō + -tiō.
observātiō f (genitive observātiōnis); third declension
Third-declension noun.
| Case | Singular | Plural |
|---|---|---|
| Nominative | observātiō | observātiōnēs |
| Genitive | observātiōnis | observātiōnum |
| Dative | observātiōnī | observātiōnibus |
| Accusative | observātiōnem | observātiōnēs |
| Ablative | observātiōne | observātiōnibus |
| Vocative | observātiō | observātiōnēs |