Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Portuguese praga
Proto-Indo-European *plak- (derived)
Latin plāga (borrowed)
Latin plangere (mention)
Portuguese chaga (doublet)
Old Portuguese praga (inherited)
Old Portuguese plaga (mention)

Portuguese chaga (doublet)
Portuguese praguejar (affix)