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 ἅπαξ
Proto-Indo-European *sem- (root)
Proto-Indo-European (derived)
Proto-Indo-European *sem- (mention)
Proto-Indo-European *sm̥-pn̥kʷu- (derived)
Latin cūnctus (mention)

English hapax legomenon (mention)
English hapaxanth (mention)
German Hapax Legomenon (mention)
Greek άπαξ (derived)
Greek άπαξ λεγόμενον (link)
French hapax (derived)
Classical Syriac ܐܦܙܓܐ (derived)