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

→ Breton rod (inherited)
→ Welsh rhod (inherited)
→ Irish roth (inherited)
→ Scottish Gaelic roth (inherited)
→ Galician rodaballo (derived)
→ Cornish ros (inherited)
→ Latin Rotomagus (derived)
→ Old Irish roth (inherited)