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

→ English giggot (derived)
→ Breton ugent (inherited)
→ Welsh ugain (inherited)
→ Irish fiche (inherited)
→ Scottish Gaelic fichead (inherited)
→ Manx feed (inherited)
→ Cornish ugens (inherited)
→ Old Irish fiche (inherited)