Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
eixordar
←
Aragonese
ensordar
(cognate)
←
Latin
surdus
(inherited)
←
Occitan
eissordar
(cognate)