§117. Adjectives of One Termination

The remaining adjectives of the third declension are Consonant stems; but most of them, except Comparatives, have the following forms of i-stems:—¹

• -ī in the ablative singular (but often -e);
• -ia in the nominative and accusative plural neuter;
• -ium in the genitive plural;
• -īs (as well as -ēs) in the accusative plural masculine and feminine.

In the other cases they follow the rule for Consonant stems.

a. These adjectives, except stems in l- or r-, form the nominative singular from the stem by adding s: as, atrōx (stem atrōc- + s), egēns (stem egent- + s).²

b. Here belong the present participles in -ns (stem nt-)³: as, amāns, monēns. They are declined like egēns (but cf. § 121).