Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Corsican
radioattivu
←
Corsican
radio-
(prefix)
←
Corsican
attivu
(prefix)
←
Spanish
radioactivo
(cognate)
←
French
radioactif
(derived)
←
Italian
radioattivo
(cognate)