Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*gʷeltā
→
Breton
gwelt
(inherited)
→
Breton
geot
(inherited)
→
Welsh
gwellt
(inherited)
→
Cornish
gwels
(inherited)