Fifth Declension (Declinatio Quinta)

The circumflex accent ( ) is used to denote the length of the vowels.


Fifth declension includes mainly nouns of feminine (only meridies midday is masculine and dies day is m/f), the sthem of which ends by the vowel e. For this reason it is usually referred to as e-declension.
 

Cases 
Singular
 
Plural
Nom.
Gen.
Dat.
Acc.
Abl.
Voc.
res
rei
rei
rem
re
res
dies
diêi
diêi
diem
die
dies
res
rerum
rebus
res
rebus
res
dies
diêrum
diêbus
dies
diêbus
dies

The stem vowel e in gen. and dat. sg. is lengthened when preceded by i-, cf. dies diêi, but fides fidei.

The most important words of the fifth declension are:

dies, diêi mf day
effigies, iêi f effigy, image, statue, copy
fides, ei f faith
materies, iêi f material, matter, lumber
meridies, iêi m midday
res, rei f thing, event, business, fact, cause, property

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