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