Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Portuguese soro
English serum (link)
English whey (link)
English sorus (link)
Ancient Greek σωρός (derived)
Latin serum (inherited)
Portuguese sérico (link)
Portuguese sero- (link)

English serum (cognate)
Spanish suero (cognate)
Portuguese antissoro (affix)