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

→ Breton piv (inherited)
→ Welsh pwy (inherited)
→ Irish cé (inherited)
→ Scottish Gaelic cò (inherited)
→ Manx quoi (inherited)
→ Cornish piw (inherited)
→ Middle Irish cía (inherited)
→ Old Irish cía (inherited)