Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Welsh darllen
Proto-Celtic *to- (derived)
Proto-Celtic *ɸare- (mention)
Proto-Celtic *leg- (mention)
Proto-Indo-European *leǵ- (derived)
Latin legō (cognate)
Middle Welsh darllein (inherited)

Welsh yn (mention)
Welsh darllan (link)
Latin lego (link)