Singular
NOMINATIVE
costasach (MASC.)
chostasach (FEM.)
GENITIVE
chostasaigh (MASC.)
costasaí (FEM.)
Plural
NOMINATIVE
costasacha
chostasacha (SLENDER CONSONANTS)
GENITIVE
costasacha (STRONG PLURALS)
costasach (WEAK PLURALS)
Other forms
COMPARATIVE
níos costasaí
▪ní ba chostasaí
SUPERLATIVE
is costasaí
▪ba chostasaí
