Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
écumer
←
French
écume
(affix)
←
French
-er
(affix)
←
Middle French
escumer
(inherited)
←
Old French
escumer
(inherited)
→
French
écumoire
(suffix)
→
French
écumage
(suffix)