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 *reh₁d-

→ English rat (root)
→ English rat (derived)
→ English rat (derived)
→ English rodent (root)
→ English erode (root)
→ English corrode (root)
→ English rostrum (root)
→ English rostrum (derived)
→ English rat-licker (root)
→ Asturian roer (mention)
→ Asturian royer (mention)
→ Catalan raure (mention)
→ Esperanto rato (root)
→ Esperanto korodi (root)
→ Spanish raer (mention)
→ Spanish roer (mention)
→ French raser (mention)
→ Galician roer (mention)
→ Italian ratto (root)
→ Italian rodere (mention)
→ Italian rasare (mention)
→ Latin rostrum (derived)
→ Latin rado (mention)
→ Latin rodo (mention)
→ Latin radula (derived)
→ Latin rastrum (derived)
→ Latin rallum (derived)
→ Portuguese roer (mention)
→ Romanian rade (mention)
→ Romanian roade (mention)
→ Sanskrit रदति (mention)
→ Swedish råtta (derived)