Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Scottish Gaelic gob
Proto-Celtic *gobbos (inherited)
Proto-Indo-European *ǵebʰ- (inherited)
Old Irish gop (inherited)

English gob (derived)
French gober (cognate)
Scottish Gaelic gobach (affix)