Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
potz
←
Catalan
pou
(cognate)
←
French
puits
(cognate)
←
Latin
puteus
(inherited)
→
Catalan
pou
(cognate)
→
Occitan
posar
(mention)
→
Portuguese
poço
(cognate)