Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
colhonar
←
French
couillonner
(cognate)
←
Occitan
colhon
(suffix)
←
Occitan
ar
(suffix)
→
French
couillonner
(cognate)