Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
serra
←
Spanish
sierra
(cognate)
←
Galician
serradoiro
(link)
←
Galician
serrar
(link)
←
Latin
serra
(inherited)
←
Latin
sera
(inherited)
←
Portuguese
serra
(cognate)
←
Old Portuguese
serra
(inherited)
→
Galician
serrón
(suffix)