Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Occitan
segle
←
Old French
siecle
(cognate)
←
Latin
saeculum
(derived)
→
Catalan
segle
(inherited)
→
Catalan
sègol
(inherited)
→
French
seigle
(derived)
→
Occitan
sègle
(inherited)