Derived from the adjectival suffix -āx (“inclined to”) + -eus (suffix indicating origin).
-āceus (feminine -ācea, neuter -āceum); first/second-declension suffix
The suffix -āceus is added to a noun to form an adjective of relationship to that noun.
First/second-declension adjective.
| Number | Singular | Plural | |||||
|---|---|---|---|---|---|---|---|
| Case / Gender | Masculine | Feminine | Neuter | Masculine | Feminine | Neuter | |
| Nominative | -āceus | -ācea | -āceum | -āceī | -āceae | -ācea | |
| Genitive | -āceī | -āceae | -āceī | -āceōrum | -āceārum | -āceōrum | |
| Dative | -āceō | -āceō | -āceīs | ||||
| Accusative | -āceum | -āceam | -āceum | -āceōs | -āceās | -ācea | |
| Ablative | -āceō | -āceā | -āceō | -āceīs | |||
| Vocative | -ācee | -ācea | -āceum | -āceī | -āceae | -ācea | |