Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old Irish íar
Proto-Celtic *eɸirom (inherited)
Proto-Indo-European *[[h₁epi]]-rom (inherited)

Irish ar (mention)
Irish iar- (derived)
Irish iarr (mention)
Irish aniar (mention)
Scottish Gaelic iar- (derived)
Old Irish ar (link)
Old Irish (mention)