Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Sardinian
cussu
←
Catalan
aqueix
(cognate)
←
Latin
eccum
(mention)
←
Latin
ipsum
(inherited)
←
Latin
ipse
(mention)
←
Sicilian
chissu
(cognate)