Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
areal
←
Spanish
arenal
(cognate)
←
Galician
area
(suffix)
←
Galician
al
(suffix)
←
Portuguese
areal
(cognate)
←
Old Portuguese
arẽal
(inherited)