Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Friulian
clâf
←
Dalmatian
cluf
(cognate)
←
French
clef
(cognate)
←
Franco-Provençal
cllâf
(cognate)
←
Latin
clāvis
(inherited)
←
Romansch
clav
(cognate)