Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Portuguese autêntico
Ancient Greek αὐθεντικός (derived)
Ancient Greek αὐθέντης (mention)
Ancient Greek αὐτός (mention)

Portuguese autenticamente (affix)
Portuguese autenticar (affix)
Portuguese autenticidade (affix)