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

→ Welsh bron (inherited)
→ Irish broinn (inherited)
→ Scottish Gaelic brù (inherited)
→ Cornish bronn (mention)
→ Latin frutex (cognate)
→ Old Irish brú (inherited)