Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
guisar
←
Galician
guisa
(suffix)
←
Galician
ar
(suffix)
←
Old Portuguese
guisar
(inherited)
→
Galician
guiso
(back-formation)