[252.] Adjectives learned thus far have had a different form in the nominative for each gender, as, bonus, m.; bona, f.; bonum, n. Such an adjective is called an adjective of three endings. Adjectives of the third declension are of the following classes:
| I. |
Adjectives of three endings— a different form in the nominative for each gender. |
| II. |
Adjectives of two endings— masculine and feminine nominative alike, the neuter different. |
| III. |
Adjectives of one ending— masculine, feminine, and neuter nominative all alike. |
[253.] Adjectives of the third declension in -er have three endings; those in -is have two endings; the others have one ending.
CLASS I
[254.] Adjectives of Three Endings are declined as follows:
| ācer, ācris, ācre, keen, eager | ||||||
| Stem ācri- | Base ācr- | |||||
| Singular | Plural | |||||
|---|---|---|---|---|---|---|
| MASC. | FEM. | NEUT. | MASC. | FEM. | NEUT. | |
| Nom. | ācer | ācris | ācre | ācrēs | ācrēs | ācria |
| Gen. | ācris | ācris | ācris | ācrium | ācrium | ācrium |
| Dat. | ācrī | ācrī | ācrī | ācribus | ācribus | ācribus |
| Acc. | ācrem | ācrem | ācre | ācrīs, -ēs | ācrīs, -ēs | ācria |
| Abl. | ācrī | ācrī | ācrī | ācribus | ācribus | ācribus |
CLASS II
[255.] Adjectives of Two Endings are declined as follows:
| omnis, omne, every, all1 | ||||
| Stem omni- | Base omn- | |||
| Singular | Plural | |||
|---|---|---|---|---|
| MASC. AND FEM. | NEUT. | MASC. AND FEM. | NEUT. | |
| Nom. | omnis | omne | omnēs | omnia |
| Gen. | omnis | omnis | omnium | omnium |
| Dat. | omnī | omnī | omnibus | omnibus |
| Acc. | omnem | omne | omnīs, ēs | omnia |
| Abl. | omnī | omnī | omnibus | omnibus |
1. omnis is usually translated every in the singular and all in the plural.