Ch 2 · Lesson 18

Adjectives and agreement: bonus, bona, bonum

An adjective agrees with its noun in case, number and gender. The first family, , , , recycles endings you already know, -er adjectives like included.

The short version

Agreement is case, number and gender. Not declension.

,

a great part, with a brave spirit
Why?

is correct even though the two words look nothing alike, because both are feminine nominative singular and that is all agreement asks for. is correct too, a third-declension adjective sitting on a second-declension noun, both ablative singular masculine. Stop expecting adjectives to rhyme with their nouns. The endings that match grammatically are the rule; the endings that also match in sound are a coincidence of the first two declensions.

A Latin adjective agrees with its noun in case, number and gender, and in nothing else. It does not have to share the noun's declension, so the two often look nothing alike: , a great part, is perfect Latin because both words are feminine.

masculinefeminineneuternominativeaccusativegenitivedativeablativeWhat do the colours mean?

The two families on one screen

FamilyDictionary formExampleEnglish
One, , a good man
One, , a good road
One, , a good word
Two, every person
Two, every body
Two, a huge city

Family one has three nominatives, family two has two (or, in the one-ending type, a single one). Either way, the ending follows the noun's gender.

Four panels: a white house with a lilac roof and a blue door; a white dog with grey ears and a blue collar; a black cat with yellow eyes; a red car.
  1. feles

Domus looks like dominus but is feminine, so the white house is alba; the dog is masculine, albus. Niger drops its e in the feminine: the black cat is nigra.

Family one: bonus, bona, bonum

The masculine is , the feminine is , the neuter is : nothing new to learn. Singular:

CaseMasculineFeminineNeuter
Nom
Acc
Gen
Abl

Plural:

CaseMasculineFeminineNeuter
Nom
Acc
Gen
Abl
  • . - The master is good.
  • . - The land is large.
  • . - He says many words.

Most of the common adjectives run this way:

AdjectiveEnglishExampleEnglish
great, big a great city
much, many many people
bad a bad man
new a new temple
small a small son
long a long road

The -er adjectives

A handful of family-one adjectives have a masculine in -er. The feminine tells you whether the e survives: keeps it, drops it.

MasculineFeminineExampleEnglish
wretched people
the sacred road
our Father
a beautiful girl

Going further: Family two: fortis, forte and the rest of the guide, when you want them. This lesson does not need them.

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Lesson 18 of 39 in this chapter

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