Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
chá
←
Latin
plana
(inherited)
←
Old Portuguese
chãa
(inherited)
→
Galician
chaira
(suffix)
→
Latin
planus
(link)