From costas (“cost, expense”) + -ach.
costasach (genitive singular masculine costasaigh, genitive singular feminine costasaí, plural costasacha, comparative costasaí)
singular | plural (m/f) | |||
---|---|---|---|---|
Positive | masculine | feminine | (strong noun) | (weak noun) |
nominative | costasach | chostasach | costasacha; chostasacha2 | |
vocative | chostasaigh | costasacha | ||
genitive | costasaí | costasacha | costasach | |
dative | costasach; chostasach1 |
chostasach; chostasaigh (archaic) |
costasacha; chostasacha2 | |
Comparative | níos costasaí | |||
Superlative | is costasaí |
1 When the preceding noun is lenited and governed by the definite article.
2 When the preceding noun ends in a slender consonant.
radical | lenition | eclipsis |
---|---|---|
costasach | chostasach | gcostasach |
Note: Certain mutated forms of some words can never occur in standard Modern Irish.
All possible mutated forms are displayed for convenience.