Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*ḱerwós
→
Breton
karv
(mention)
→
Welsh
carw
(mention)
→
Cornish
karow
(mention)