Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Portuguese
ouro
←
Proto-Indo-European
*h₂é-h₂us-o-
(derived)
←
Old Latin
ausum
(inherited)
←
Proto-Italic
*auzom
(inherited)
←
Latin
aurum
(inherited)
→
Galician
ouro
(inherited)