Editing Latin declension (section)

=== First- and second-declension adjectives ===
First- and second-declension adjectives are inflected in the masculine, the feminine and the neuter; the masculine form typically ends in ''-us'' (although some end in ''-er'', see below), the feminine form ends in ''-a'', and the neuter form ends in ''-um''. Therefore, some adjectives are given like {{wikt-lang|la|altus|altus, alta, altum}}.

Adjectives ending ''-ius'' use the vocative ''-ie'' (''ēbrie'', "[O] drunk man", vocative of ''ēbrius''), just as in Old Latin all ''-ius'' nouns did (''fīlie'', "[O] son", archaic vocative of ''fīlius'').

{| class="wikitable"
! rowspan="3" |
! colspan="6" | {{wikt-lang|la|altus|altus, alta, altum}}<br /> high, long, tall
|-
! colspan="3" | Singular
! colspan="3" | Plural
|-
! Masculine
! Feminine
! Neuter
! Masculine
! Feminine
! Neuter
|-
! Nominative
| altus || rowspan="2" | alta || rowspan="3" | altum || rowspan="2" | altī || rowspan="2" | altae || rowspan="3" | alta
|-
! Vocative
| alte
|-
! Accusative
| altum || altam || altōs || altās
|-
! Genitive
| altī || rowspan="2" | altae || altī || altōrum || altārum || altōrum
|-
! Dative
| rowspan="2" | altō || rowspan="2" | altō || rowspan="2" colspan="3" | altīs
|-
! Ablative
| altā
|}

==== First- and second-declension ''-r'' adjectives ====
Some first- and second-declension adjectives' masculine forms end in ''-er''. As with second-declension ''-r'' nouns, some adjectives retain the ''e'' throughout inflection, and some omit it. {{wikt-lang|la|sacer|Sacer, sacra, sacrum}} omits its ''e'' while {{wikt-lang|la|miser|miser, misera, miserum}} keeps it.
{| class="wikitable"
! rowspan="3" |
! colspan="6" | {{wikt-lang|la|miser|miser, misera, miserum}}<br /> sad, poor, unhappy
|-
! colspan="3" | Singular
! colspan="3" | Plural
|-
! Masculine
! Feminine
! Neuter
! Masculine
! Feminine
! Neuter
|-
! Nominative
| rowspan="2" |miser || rowspan="2" |misera || rowspan="3" | miserum || rowspan="2" |miserī || rowspan="2" |miserae || rowspan="3" | misera
|-
! Vocative
|-
! Accusative
| miserum || miseram || miserōs || miserās
|-
! Genitive
| miserī || rowspan="2" | miserae || miserī || miserōrum || miserārum || miserōrum
|-
! Dative
| rowspan="2" | miserō || rowspan="2" | miserō || rowspan="2" colspan="3" | miserīs
|-
! Ablative
| miserā
|}
{| class="wikitable"
! rowspan="3" |
! colspan="6" |{{wikt-lang|la|sacer|sacer, sacra, sacrum}}<br /> sacred, holy
|-
! colspan="3" | Singular
! colspan="3" | Plural
|-
! Masculine
! Feminine
! Neuter
! Masculine
! Feminine
! Neuter
|-
! Nominative
| rowspan="2" |sacer || rowspan="2" |sacra || rowspan="3" | sacrum || rowspan="2" |sacrī || rowspan="2" |sacrae || rowspan="3" | sacra
|-
! Vocative
|-
! Accusative
| sacrum || sacram || sacrōs || sacrās
|-
! Genitive
| sacrī || rowspan="2" | sacrae || sacrī || sacrōrum || sacrārum || sacrōrum
|-
! Dative
| rowspan="2" | sacrō || rowspan="2" | sacrō || rowspan="2" colspan="3" | sacrīs
|-
! Ablative
| sacrā
|}

==== First and second declension pronominal adjectives ====
Nine first and second declension pronominal adjectives are irregular in the genitive and dative singular in all genders. They can be remembered by using the mnemonic acronym {{lang|la|ūnus nauta}}. They are:

*{{wikt-lang|la|ullus|ūllus, ūlla, ūllum}} 'any';
*{{wikt-lang|la|nullus|nūllus, nūlla, nūllum}} 'no, none';
*{{wikt-lang|la|uter|uter, utra, utrum}} 'which [of two], either';
*{{wikt-lang|la|solus|sōlus, sōla, sōlum}} 'sole, alone';
*{{wikt-lang|la|neuter|neuter, neutra, neutrum}} 'neither';
*{{wikt-lang|la|alius|alius, alia, aliud}} 'another' (the genitive singular ''alīus'' is often replaced by ''alterīus'' or by ''aliēnus'' 'of another');<ref>Gildersleeve & Lodge (1903), ''Gildersleeve's Latin Grammar'', p. 39.</ref>
*{{wikt-lang|la|unus|ūnus, ūna, ūnum}} 'one';
*{{wikt-lang|la|totus|tōtus, tōta, tōtum}} 'whole';
*{{wikt-lang|la|alter|alter, altera, alterum}} 'other [of two]'.
{| class="wikitable"
! rowspan="3" |
! colspan="6" | {{wikt-lang|la|ullus|ūllus, ūlla, ūllum}}<br />any
|-
! colspan="3" | Singular
! colspan="3" | Plural
|-
! Masculine
! Feminine
! Neuter
! Masculine
! Feminine
! Neuter
|-
! Nominative
| ūllus || ūlla || rowspan="2" | ūllum || ūllī || ūllae ||  rowspan="2" | ūlla
|-
! Accusative
| ūllum || ūllam || ūllōs || ūllās
|-
! Genitive
| colspan="3" | ūllīus || ūllōrum || ūllārum || ūllōrum
|-
! Dative
| colspan="3" | ūllī || rowspan="2" colspan="3" | ūllīs
|-
! Ablative
| ūllō || ūllā ||  ūllō
|}