Classical Latin adjectival declensions
There are two classes of adjective in Classical Latin. Class I adjectives may have masculine nominative singular forms in -er (eg tener, noster); this can also be the case for class II (eg celeber, ācer), where in addition the same nominative singular sometimes applies across the board (eg fēlix, m, f & n). Present participles in class II also follow this rule (eg amāns, amāns, amāns in the nominative and amantem, amantem, amāns in the accusative.)
| Class I |
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| Masculine |
Feminine |
Neuter |
|
| Singular |
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| Nominative |
bonus |
bona |
bonum |
| Accusative |
bonum |
bonam |
bonum |
| Genitive |
bonī |
bonae |
bonī |
| Dative |
bonō |
bonae |
bonō |
| Ablative |
bonō |
bonā |
bonō |
| Plural |
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| Nominative |
bonī |
bonae |
bona |
| Accusative |
bonōs |
bonās |
bona |
| Genitive |
bonōrum |
bonārum |
bonōrum |
| Dative |
bonīs |
bonīs |
bonīs |
| Ablative |
bonīs |
bonīs |
bonīs |
| ClassII |
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| Singular |
||
| Nominative |
trīstis |
trīste |
| Accusative |
trīstem |
trīste |
| Genitive |
trīstis |
trīstis |
| Dative |
trīstī |
trīstī |
| Ablative |
trīstī |
trīstī |
| Plural |
||
| Nominative |
trīstēs |
trīstia |
| Accusative |
trīstēs |
trīstia |
| Genitive |
trīstium |
trīstium |
| Dative |
trīstibus |
trīstibus |
| Ablative |
trīstibus |
trīstibus |