Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Luxembourgish Rou
Danish ro (cognate)
German Ruhe (cognate)
English roo (cognate)
Proto-Germanic *rōwō (inherited)
Old High German ruowa (inherited)
Icelandic (cognate)

Alemannic German Ruew (cognate)
Luxembourgish roueg (affix)