Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Ancient Greek ἐρεύγομαι
Old English rocettan (cognate)
Proto-Indo-European *h₁rewg- (root)
Proto-Indo-European *h₁rewg- (derived)
Latin ērūgō (cognate)
Lithuanian riaugėti (cognate)
Russian рыга́ть (cognate)
Albanian regj (cognate)
Old Armenian ործամ (cognate)

Greek ρεύομαι (derived)
Latin rumen (cognate)
Latin rugio (cognate)
Latin ructo (cognate)
Albanian regj (cognate)