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 leum
Proto-Celtic *lang-smen- (inherited)
Welsh llam (cognate)
Proto-Indo-European *legʷh- (derived)
Old Irish léimm (inherited)

Scottish Gaelic leumadair (suffix)
Scottish Gaelic dì-leum (prefix)
Scottish Gaelic ath-leum (prefix)
Scottish Gaelic frith-leum (prefix)