Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Irish go
German ge- (cognate)
German gegen (mention)
English gain- (cognate)
Spanish con (cognate)
Proto-Indo-European *ḱóm (inherited)
Russian ко (cognate)
Old Irish co (inherited)

English galore (derived)
Irish do (mention)
Irish do (mention)
Irish gur (suffix)
Irish chuig (mention)
Irish go dtí (mention)
Irish go brách (mention)
Scottish Gaelic gu (cognate)