15.08.24: Level 1; Maxey (10) [4]: 1st / 2nd declension adjectives; nominative and accusative singular and plural

bonus, bona, bonum

The adjectives are called 1^st / 2^nd declension adjectives because they have the same endings as 1^st and 2^nd declension nouns.

https://en.wikisource.org/wiki/Latin_for_beginners_(1911)/Part_II/Lesson_XI

When they are listed in vocabularies, they are shown with the masculine, feminine and neuter nominative singular e.g.

bonus, a, -um: good

Almost all 1^st / 2^nd declension adjectives have the nominative masculine singular in -us. A small number end in -er but for the rest of the declension they have the same endings. Note that some of them e.g. aeger (sick) lose the /e/ as soon as the endings are added. The nominative and accusative singular and plural of neuter nouns have the same ending.

miser, -a, -um: wretched; miserable

aeger, aegra, aegrum: sick

Image: the table shows the nominative and accusative singular and plural of all three genders although the text only deals with the masculine and feminine.

Note: the nominative and accusative singular and plural of the neuter adjectives have the same endings.