Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
comezar
←
Latin
com-
(mention)
←
Latin
initiāre
(inherited)
←
Latin
initiō
(mention)
←
Old Portuguese
começar
(inherited)
←
Old Portuguese
*comẽeçar
(mention)
→
Catalan
començar
(cognate)
→
Galician
comezo
(back-formation)
→
Portuguese
começar
(cognate)