Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
pagar
←
Latin
pacāre
(inherited)
←
Latin
pacō
(mention)
←
Old Portuguese
pagar
(inherited)
→
Galician
pago
(back-formation)