Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
mur
←
Proto-Indo-European
*mei
(derived)
←
Latin
mūrus
(inherited)
←
Latin
*moerus
(mention)
←
Latin
*moiros
(mention)
←
Old Occitan
mur
(inherited)