Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
cosa
←
Catalan
causa
(doublet)
←
Latin
causa
(inherited)
←
Old Occitan
(inherited)
→
Catalan
causa
(doublet)
→
Catalan
coseta
(affix)
→
Portuguese
coisa
(cognate)