Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
mancha
←
Galician
manchado
(mention)
←
Galician
mágoa
(doublet)
←
Latin
macula
(inherited)
→
Galician
manchar
(link)