Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
acostumar
←
Galician
a-
(affix)
←
Galician
costume
(affix)
←
Galician
-ar
(affix)
←
Old Portuguese
acostumar
(inherited)