Singular
NOMINATIVE
tríthoiseach (MASC.)
thríthoiseach (FEM.)
GENITIVE
thríthoisigh (MASC.)
tríthoisí (FEM.)
Plural
NOMINATIVE
tríthoiseacha
thríthoiseacha (SLENDER CONSONANTS)
GENITIVE
tríthoiseacha (STRONG PLURALS)
tríthoiseach (WEAK PLURALS)
Other forms
COMPARATIVE
níos tríthoisí
▪ní ba thríthoisí
SUPERLATIVE
is tríthoisí
▪ba thríthoisí