All about the Latin language

Declining third declension adjectives ...

Declining third declension adjectives

Third declension adjectives can be split into I stems and consonant stems.

The majority of third declension Latin adjectives are classed as I stems , so called because the stems in the ablative singular for all genders end in i. Consonant stems form a much smaller group and are declined separetely.

* Third declension adjectives. I stems

There are I stems, I stems and I Stems. I stems, are split (decline differently) depending on the ending of the adjective in nominative singular masculine, feminine and neuter.

Third declension adjectives with the ending -is, -is, -e

Adjectives (I stems) which have the endings -is, -is, -e in the nominative singular are declined as tristis, is, e (sad).

Singular

M. F. N.
tristis tristis triste
tristis tristis triste
tristem tristem triste
tristis tristis tristis
tristi tristi tristi
tristi tristi tristi


Plural

M. F. N.
tristes tristes tristia
tristes tristes tristia
tristes tristes tristia
tristium tristium tristium
tristibus tristibus tristibus
tristibus tristibus tristibus


Third declension Latin adjectives (I stems) which have the same endings in the masculine, feminine and neuter in the nominative singular are declined like ingens (huge).

Or like felix,felix,felix depending on the endings.

M. F. N.
ingens ingens ingens
ingens ingens ingens
ingentem ingentem ingens
ingentis ingentis ingentis
ingenti ingenti ingenti
ingenti ingenti ingenti


Plural

M. F. N.
ingentes ingentes ingentia
ingentes ingentes ingentia
ingentes ingentes ingentia
ingentium ingentium ingentium
ingentibus ingentibus ingentibus
ingentibus ingentibus ingentibus


Third declension Latin adjectives with endings -er, -ris, -re

Third declension Latin adjectives (I stems) which have the endings -er, -ris, -re for the masculine, feminine and neuter in the singular are declined like acer (keen).

In a dictionary, acer could be cited as acer, acris, acre or ac/er -ris

Singular

M. F. N.
acer acris acre
acer acris acre
acrem acrem acre
acris acris acris
acri acri acri
acri acri acri


Plural

M. F. N.
acres acres acria
acres acres acria
acres acres acria
acrium acrium acrium
acribus acribus acribus
acribus acribus acribus