1. It will be observed that vetus is declined as a pure Consonant-Stem; i.e. Ablative Singular in -e, Genitive Plural in -um, Nominative Plural Neuter in -a, and Accusative Plural Masculine and Feminine in -es only. In the same way are declined compos, controlling; dives, rich; particeps, sharing; pauper, poor; princeps, chief; sospes, safe; superstes, surviving. Yet dives always has Neut. Plu. ditia.
2. Inops, needy, and memor, mindful, have Ablative Singular inopi, memori, but Genitive Plural inopum, memorum.
3. Participles in -ans and -ens follow the declension of i-stems. But they do not have -i the Ablative, except when employed as adjectives; when used as participles or as substantives, they have -e; as,—
a sapienti viro, by a wise man;
but
a sapiente, by a philosopher.
Tarquinio regnante, under the reign
of Tarquin.
4. Plus, in the Singular, is always a noun.
5. In the Ablative Singular, adjectives, when used as substantives,—
a) usually retain the adjective declension; as,—
aequalis, contemporary,
Abl. aequali.
consularis, ex-consul,
Abl. consulari
So names of Months; as, Aprili, April; Decembri, December.
b) But adjectives used as proper names
have -e in the Ablative Singular;
as, Celere, Celer; Juvenale, Juvenal.
c) Patrials in -as, -atis and -is, -itis,
when designating places
regularly have -i; as, in Arpinati, on
the estate at Arpinum, yet -e,
when used of persons; as, ab Arpinate,
by an Arpinatian.
6. A very few indeclinable adjectives occur, the chief of which are frugi, frugal; nequam, worthless.
7. In poetry, adjectives and participles in -ns sometimes form the Gen. Plu. in -um instead of -ium; as, venientum, of those coming.
* * * * *
COMPARISON OF ADJECTIVES.
71. 1. There are three degrees of Comparison,—the Positive, the Comparative, and the Superlative.
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.
felix, fortunate, felicior,
felicissimus.