Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
afallen
←
Proto-Brythonic
*aβaln
(inherited)
←
Proto-Celtic
*abalnā
(inherited)
→
Welsh
afallennau
(affix)