Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
brezhon
←
Proto-Brythonic
*Brɨθon
(inherited)
→
Breton
brezhoneg
(suffix)
→
Breton
brezhonek
(suffix)