Fifth declension is the smallest declension - not very many words are part of it. You can tell that a word is fifth declension if it has -ei in genitive singular.
Here are the endings for fifth declension:
Here are the endings for fifth declension:
|
Singular |
Plural |
Nominative |
-es |
-es |
Genitive |
-ei |
-erum |
Dative |
-ei |
-ebus |
Accusative |
-em |
-es |
Ablative |
-e |
-ebus |
And here's an example of a fifth declension word declined. For some reason, only two words in fifth declension actually have all of their forms - dies, diei (day) and res, rei (thing/matter). Most fifth declension nouns don't have plural forms. Dies, diei is even more unusual because it is the only masculine word in fifth declension.
|
Singular |
Plural |
Nominative |
dies |
dies |
Genitive |
diei |
dierum |
Dative |
diei |
diebus |
Accusative |
diem |
dies |
Ablative |
die |
diebus |