Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Portuguese
poo
←
Proto-Indo-European
*pel-
(derived)
←
Latin
*pulvus
(mention)
←
Latin
pulvis
(inherited)
→
Galician
po
(inherited)
→
Portuguese
pó
(inherited)