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 *dʰubʰrós

→ Breton dour (inherited)
→ Welsh dŵr (inherited)
→ Irish dobhar (inherited)
→ Cornish dowr (inherited)
→ Polish debrza (inherited)
→ Old Irish dobur (derived)
→ Old Polish debrz (inherited)