Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Irish marg
Old English marc (derived)
Irish brugh (doublet)
Irish marc (doublet)
Proto-Germanic *markō (derived)
Proto-Germanic *marką (derived)
Old Norse mǫrk (derived)
Old Irish marg (inherited)
Old Irish marg (inherited)

Irish marc (doublet)
Irish marc (link)