Singular
NOMINATIVE
ceathrúnach (MASC.)
cheathrúnach (FEM.)
GENITIVE
cheathrúnaigh (MASC.)
ceathrúnaí (FEM.)
Plural
NOMINATIVE
ceathrúnacha
cheathrúnacha (SLENDER CONSONANTS)
GENITIVE
ceathrúnacha (STRONG PLURALS)
ceathrúnach (WEAK PLURALS)
Other forms
COMPARATIVE
níos ceathrúnaí
▪ní ba cheathrúnaí
SUPERLATIVE
is ceathrúnaí
▪ba cheathrúnaí
