Irish

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Etymology

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gar- (near) +‎ athair (father)

Noun

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garathair m (genitive singular garathar, nominative plural garaithreacha)

  1. great-grandfather

Declension

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Mutation

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Irish mutation
Radical Lenition Eclipsis
garathair gharathair ngarathair
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.