Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
badallar
←
Occitan
badalhar
(cognate)
←
Old Occitan
badallar
(inherited)
→
Old French
baaillier
(cognate)
→
Occitan
badalhar
(cognate)