Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Franco-Provençal
comenciér
←
Spanish
comenzar
(cognate)
←
French
commencer
(cognate)
←
Italian
cominciare
(cognate)
←
Latin
com-
(derived)
←
Occitan
començar
(cognate)
←
Portuguese
começar
(cognate)
←
Romansch
cumanzar
(cognate)