Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
derreter
←
Spanish
derretir
(cognate)
←
Galician
reter
(mention)
←
Latin
retero
(inherited)
←
Portuguese
derreter
(cognate)
→
Portuguese
derreter
(cognate)