Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
pou
←
Spanish
pozo
(cognate)
←
French
puits
(cognate)
←
Proto-Indo-European
*paw-
(derived)
←
Latin
puteus
(inherited)
←
Occitan
potz
(cognate)
←
Old Occitan
(inherited)
→
Occitan
potz
(cognate)
→
Portuguese
poço
(cognate)