Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Corsican
caghju
←
Corsican
caghja
(doublet)
←
Corsican
caghiu
(link)
←
Italian
caglio
(cognate)
←
Latin
coagulum
(inherited)
←
Portuguese
coalho
(cognate)
→
Corsican
caghjarella
(suffix)
→
Corsican
caghja
(doublet)