Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
gachar
←
French
guetter
(cognate)
←
Old Occitan
gaitar
(inherited)
→
Occitan
agachar
(prefix)
→
Occitan
agachar
(link)