Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English trigon
English tri (confix)
English gon (confix)
English trigonon (doublet)
Ancient Greek τρίγωνον (derived)
Ancient Greek τρίγωνος (mention)
Ancient Greek τρεῖς (mention)
Ancient Greek γωνία (mention)

English tri- (link)
English trigonal (suffix)
English trigonic (suffix)
English trigonon (doublet)