Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Occitan
comensar
←
Old French
comencier
(cognate)
←
Latin
com-
(inherited)
←
Latin
initiō
(mention)
→
Catalan
començar
(mention)
→
Occitan
començar
(mention)