Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
dant
←
Proto-Brythonic
*dant
(inherited)
←
Proto-Celtic
*dantom
(inherited)
←
Proto-Indo-European
*h₃dónts
(inherited)