Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Maltese
oskur
←
Italian
oscuro
(borrowed)
←
Latin
obscurus
(derived)
←
Maltese
skur
(mention)
←
Sicilian
scuru
(cognate)