Editing Latin declension (section)

=== {{anchor|d5}}{{anchor|Fifth declension}} Fifth declension (''e'' stems) ===
The fifth declension is a small group of nouns consisting of mostly feminine nouns like {{wikt-lang|la|res|rēs, reī}} {{abbr|f.|feminine}} ('affair, matter, thing') and ''diēs, diēī'' {{abbr|m.|masculine}} ('day'; but {{abbr|f.|feminine}} in names of days).

{| class="wikitable"
|+ Fifth declension paradigm
|-
! rowspan="2" |
! colspan="2" | ''-iēs'' ending nouns || colspan="2" | ''-ēs'' ending nouns
|-
! Singular || Plural
! Singular || Plural
|-
! Nominative, Vocative
| -iēs || rowspan="2" | -iēs ||-ēs || rowspan="2" | -ēs
|-
! Accusative
| -iem || -em
|-
! Genitive
| rowspan="2" | -iēī || -iērum || rowspan="2" | -eī || -ērum
|-
! Dative
| rowspan="2" | -iēbus  || rowspan="2" | -ēbus
|-
! Ablative, Locative
| -iē || -ē
|}
{| class="wikitable"
! rowspan="2" |
! colspan="2" | {{wikt-lang|la|dies|diēs, diēī}}<br />day {{abbr|m.|masculine}}, {{abbr|f.|feminine}}
! colspan="2" | {{wikt-lang|la|res|rēs, reī}}<br />thing {{abbr|f.|feminine}}
|-
! Singular
! Plural
! Singular
! Plural
|-
! Nominative, Vocative
|diēs || rowspan="2" | diēs ||rēs || rowspan="2" | rēs
|-
! Accusative
| diem || rem
|-
! Genitive
| rowspan="2" | diēī || diērum || rowspan="2" | reī || rērum
|-
! Dative
| rowspan="2" | diēbus || rowspan="2" | rēbus
|-
! Ablative, Locative
| diē || rē
|}
Nouns ending in ''-iēs'' have long ''ēī'' in the dative and genitive, while nouns ending in a consonant + ''-ēs'' usually have short ''eī'' in these cases. Other forms of the genitive singular are also found, such as {{lang|la|diī}} (''Aeneid'' 1.636), {{lang|la|diē}} (''Georgic'' 1.208), {{lang|la|diēs}} (Ennius).<ref>Ernout (1953), p. 69.</ref>

The locative ending of the fifth declension was ''-ē'' (singular only), identical to the ablative singular, as in {{wikt-lang|la|hodiē}} ('today').