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.
Irish mutation | ||
---|---|---|
Radical | Lenition | Eclipsis |
costasach | chostasach | gcostasach |
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. |