Internet Workbook for the Oxford Latin Course

Latin Noun Endings of the Five Declensions

1 f/m 2 m 2 n 3 f/m 3 n 3-i f/m 3-i n 4 m/f 4 n 5 f/m
Nom. -a -us/-er -um --- --- --- --- -us -u -es
Gen. -ae -i -i -is -is -is -is -us -us -ei
Dat. -ae -o -o -i -i -i -i -ui -u -ei
Acc. -am -um -um -em --- -em --- -um -u -em
Abl. -a -o -o -e -e -i/-e -i -u -u -e
plural forms
Nom. -ae -i -a -es -a -es -ia -us -ua -es
Gen. -arum -orum -orum -um -um -ium -ium -uum -uum -erum
Dat. -is -is -is -ibus -ibus -ibus -ibus -ibus -ibus -ebus
Acc. -as -os -a -es -a -es -ia -us -ua -es
Abl. -is -is -is -ibus -ibus -ibus -ibus -ibus -ibus -ebus

Nota Bene:

A noun belongs in the declension to which its genitive form corresponds. The endings (except nominative singular) are added to the noun stem, which is found by removing the genitive ending (e.g. rex, regis, m. = 3rd decl., the stem is reg [reg + -is]), and it is declined in the 3 f/m column because it is masculine.

Third declension nouns are -i stem if they are feminine or masculine and 1) end in -s or -x and have the same number of syllables in the nominative and genitive singular (they usually have -is in the nominative: e.g. turris, turris, f.), or 2) have double consonants before the genitive ending is added (e.g. linter, lintris, f.). Neuter nouns are 3rd -i stem if their nominative form ends in -al, -ar, or -e.

Vocative forms are usually the same as the nominative, except that -us masculine nouns in the second declension have a vocative singular in -e. If the nominative ends in -ius [e.g. Vergilius] the vocative singular just drops the -us [e.g. Vergili]).


Return to the Chapter 21 Index


Internet Workbook for the Oxford Latin Course © 2001, Robert W. Cape, Jr.
These materials are for educational use only and may not be reproduced or distributed in another form or for profit without permission.