edited by Meagan Ayer et al.

1st and 2nd Declension Adjectives: Genitive in -īus, Dative in -ī

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113. The following nine adjectives with their compounds have the Genitive Singular in -īus and the Dative in in all genders.

alius [aliud (n.)] other tōtus whole alter, -terīus the other
nūllus no, none ūllus  any neuter, -trīus neither
sōlus alone ūnus  one uter, -trīus which (of two)

Of these, the singular is thus declined.

1st and 2nd Declension Adjectives with Genitive ending in -īus, Dative in -ī

a. The plural of these words is regular, like that of bonus (§ 110).

b. The genitive in -īus, dative in , and neuter in -d are pronominal in origin (cf. illīus, illī, illud, and § 146).

c. The i of the genitive ending -īus, though originally long, may be made short in verse; this occurs often in alterius and regularly in utriusque.

d. Instead of alīus, alterīus is commonly used, or in the possessive sense the adjective aliēnus, belonging to another, another's.

e. In compounds—such as alteruter—sometimes both parts are declined, sometimes only the latter. Thus, alterī utrī or alterutrī, to one of the two.

Note— The regular genitive and dative forms (as in bonus) are sometimes found in some of these words.

gen. and dat.( f.) aliae
dat. (m.) aliō

Rare forms are alis and alid (for alius, aliud).

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Suggested Citation

Meagan Ayer, Allen and Greenough’s New Latin Grammar for Schools and Colleges. Carlisle, Pennsylvania: Dickinson College Commentaries, 2014. ISBN: 978-1-947822-04-7. http://dcc.dickinson.edu/grammar/latin/1st-and-2nd-declension-adjectives-genitive-%C4%ABus-dative-%C4%AB