Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
cru
←
Spanish
crudo
(cognate)
←
French
cru
(cognate)
←
Latin
crūdus
(inherited)
←
Occitan
crus
(cognate)
←
Old Occitan
(inherited)
→
Catalan
cruesa
(suffix)