Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
bailar
←
Old Occitan
balar
(derived)
←
Old Portuguese
baylar
(inherited)
→
Galician
baile
(back-formation)
→
Galician
baila
(back-formation)