Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
folgueira
←
Catalan
falguera
(cognate)
←
French
fougère
(cognate)
←
Latin
filix
(inherited)
←
Portuguese
felgueira
(cognate)
←
Old Portuguese
(inherited)
→
Catalan
falguera
(cognate)
→
French
fougère
(cognate)