Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Ancient Greek ὀπή
Ancient Greek ὄμμα (mention)
Proto-Indo-European *h₃ekʷ- (derived)

English metope (affix)
English stenopaeic (mention)
Greek οπή (mention)
Ancient Greek ἀστραπή (affix)
Ancient Greek μετόπη (affix)
Ancient Greek ὄπεας (mention)
Ancient Greek ὀπαῖος (suffix)
Italian metopa (mention)
Latvian aka (cognate)