From Middle Irish grísach.[1][2] By surface analysis, gríos + -ach.
gríosach f (genitive singular gríosaí)
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Bare forms (no plural form of this noun)
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Forms with the definite article
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gríosach (genitive singular masculine gríosaigh, genitive singular feminine gríosaigh, plural gríosacha, comparative gríosaigh)
| Singular | Plural (m/f) | |||
|---|---|---|---|---|
| Positive | Masculine | Feminine | (strong noun) | (weak noun) |
| Nominative | gríosach | ghríosach | gríosacha; ghríosacha² | |
| Vocative | ghríosaigh | gríosacha | ||
| Genitive | gríosaí | gríosacha | gríosach | |
| Dative | gríosach; ghríosach¹ |
ghríosach; ghríosaigh (archaic) |
gríosacha; ghríosacha² | |
| Comparative | níos gríosaí | |||
| Superlative | is gríosaí | |||
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 |
| gríosach | ghríosach | ngríosach |
| Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. | ||