Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
sábalo
←
Gaulish
*sabŏlos
(derived)
←
Proto-Celtic
*samos
(derived)
→
Galician
sable
(cognate)