From Old Irish cathaisech (“vigilant; noisy”). By surface analysis, cathais (“vigil, watch”) + -ach. Compare Cathasach (name).
cathaiseach (genitive singular masculine cathaisigh, genitive singular feminine cathaisí, plural cathaiseacha, comparative cathaisí)
cathaiseach (genitive singular masculine cathaisigh, genitive singular feminine cathaisí, plural cathaiseacha, comparative cathaisí)
Singular | Plural (m/f) | |||
---|---|---|---|---|
Positive | Masculine | Feminine | (strong noun) | (weak noun) |
Nominative | cathaiseach | chathaiseach | cathaiseacha; chathaiseacha² | |
Vocative | chathaisigh | cathaiseacha | ||
Genitive | cathaisí | cathaiseacha | cathaiseach | |
Dative | cathaiseach; chathaiseach¹ |
chathaiseach; chathaisigh (archaic) |
cathaiseacha; chathaiseacha² | |
Comparative | níos cathaisí | |||
Superlative | is cathaisí |
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 |
cathaiseach | chathaiseach | gcathaiseach |
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. |