Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
regain
←
French
re
(prefix)
←
French
gaaignier
(prefix)
←
Old French
regain
(inherited)
→
French
gain
(cognate)