Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
chweched
←
Proto-Brythonic
*hwexed
(inherited)
←
Proto-Celtic
*swexstos
(inherited)
←
Welsh
chwech
(affix)
←
Welsh
-ed
(affix)
→
Welsh
chweched ar hugain
(compound)