Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
mexo
←
Spanish
meo
(cognate)
←
Galician
mexar
(back-formation)
←
Portuguese
mijo
(cognate)
→
Galician
mexeira
(suffix)