Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
estiu
←
Latin
aestīvum
(inherited)
←
Old Occitan
estiu
(inherited)
→
Catalan
estiu
(cognate)
→
Occitan
estivenc
(affix)