Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*arwī
→
Breton
erv
(inherited)
→
Welsh
erw
(inherited)
→
Ancient Greek
ἔραζε
(cognate)