Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Welsh dwfr

→ Welsh dyfroedd (affix)
→ Welsh dyfrgi (compound)
→ Welsh dyfrgwn (affix)
→ Welsh dyffryn (affix)
→ Welsh dyfrfarch (affix)
→ Welsh Dyfrdwy (affix)
→ Welsh dyfrgist (compound)
→ German Tauber (cognate)
→ Spanish Duero (cognate)
→ Irish dobhar (cognate)