Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English protagonist
English prot (prefix)
English agonist (prefix)
Ancient Greek πρωταγωνιστής (derived)
Ancient Greek πρῶτος (mention)
Ancient Greek ἀγωνιστής (mention)

English protagonistic (suffix)
English nonprotagonist (prefix)
English protagon (mention)
English coprotagonist (prefix)