Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
seixo
←
Spanish
saxo
(cognate)
←
Italian
sasso
(cognate)
←
Latin
saxum
(inherited)
→
Spanish
saxo
(cognate)
→
Galician
seixo
(cognate)
→
Italian
sasso
(cognate)