Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Portuguese
os
→
Fala
os
(inherited)
→
Fala
dos
(mention)
→
Galician
os
(inherited)
→
Portuguese
os
(inherited)
→
Portuguese
nos
(mention)