Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gro
←
Proto-Brythonic
*grọw
(inherited)
←
Proto-Celtic
*grāwā
(inherited)
→
English
gravel
(cognate)
→
Old French
grave
(mention)