Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Sardinian
deghere
←
Proto-Indo-European
*deḱ-
(derived)
←
Proto-Italic
*dekēō
(inherited)
←
Latin
decēre
(inherited)