Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Indo-European *h₃reyH-

→ English run (derived)
→ English Rhine (derived)
→ English roam (mention)
→ Old English riþ (inherited)
→ Old English Rin (derived)
→ Catalan riera (mention)
→ Czech rojník (derived)
→ German Rhein (derived)
→ Persian ریدن (inherited)
→ Icelandic raust (derived)
→ Latin Rhenus (derived)
→ Latin irrito (mention)
→ Latin rivus (mention)
→ Norwegian Bokmål rival (root)
→ Norwegian Bokmål rival (mention)
→ Norwegian Bokmål barndomsrival (root)
→ Norwegian Bokmål barndomsrival (mention)
→ Polish Ren (derived)
→ Polish rzeka (mention)
→ Russian река (root)
→ Russian река (mention)
→ Russian рой (root)
→ Russian ринуть (root)
→ Sanskrit रीति (mention)
→ Sanskrit रिणाति (mention)
→ Sanskrit रेतस् (derived)
→ Albanian re (derived)
→ Albanian rrjedh (mention)