Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
abalar
←
Latin
vallis
(derived)
←
Old Portuguese
abalar
(inherited)
→
Galician
abalo
(back-formation)
→
Galician
pedra de abalar
(mention)