Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
encorar
←
Galician
en-
(prefix)
←
Galician
cor
(prefix)
←
Galician
acorar
(mention)
←
Latin
cor
(derived)
←
Old Portuguese
cor
(derived)
→
Galician
encoro
(back-formation)