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.
| singular | plural | ||||||
|---|---|---|---|---|---|---|---|
| masculine | feminine | neuter | masculine | feminine | neuter | ||
| nominative | -āceus | -ācea | -āceum | -āceī | -āceae | -ācea | |
| genitive | -āceī | -āceae | -āceī | -āceōrum | -āceārum | -āceōrum | |
| dative | -āceō | -āceae | -āceō | -āceīs | |||
| accusative | -āceum | -āceam | -āceum | -āceōs | -āceās | -ācea | |
| ablative | -āceō | -āceā | -āceō | -āceīs | |||
| vocative | -ācee | -ācea | -āceum | -āceī | -āceae | -ācea | |