2. The Comparative is regularly formed by adding -ior (Neut. -ius), and the Superlative by adding -issimus (-a, -um), to the Stem of the Positive deprived of its final vowel; as,—
| altus, high, | altior, higher, | altissimus, highest, very high. |
| fortis, brave, | fortior, | fortissimus. |
| fēlīx, fortunate, | fēlīcior, | fēlīcissimus. |
So also Participles, when used as Adjectives; as,—
| doctus, learned, | doctior, | doctissimus. |
| egēns, needy, | egentior, | egentissimus. |
3. Adjectives in -er form the Superlative by appending -rimus to the Nominative of the Positive. The Comparative is regular. Thus:—
| asper, rough, | asperior, | asperrimus. |
| pulcher, beautiful, | pulchrior, | pulcherrimus. |
| ācer, sharp, | ācrior, | ācerrimus. |
| celer, swift, | celerior, | celerrimus. |
a. Notice mātūrus, mātūrior, mātūrissimus or mātūrrimus.
4. Five Adjectives in -ilis form the Superlative by adding -limus to the Stem of the Positive deprived of its final vowel. The Comparative is regular. Thus:—
| facilis, easy, | facilior, | facillimus. |
| difficilis, diffcult, | difficilior, | difficillimus. |
| similis, like, | similior, | simillimus. |
| dissimilis, unlike, | dissimilior, | dissimillimus. |
| humilis, low, | humilior, | humillimus. |
5. Adjectives in -dicus, -ficus, and -volus form the Comparative and Superlative as though from forms in -dīcēns, -ficēns, -volēns. Thus:—