Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
reixa
←
Catalan
reixa
(cognate)
←
Spanish
reja
(cognate)
←
Latin
regula
(derived)
←
Portuguese
relha
(cognate)
→
Portuguese
relha
(cognate)