Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
dimarts
←
Latin
diēs Martis
(inherited)
←
Occitan
dimars
(cognate)
→
Occitan
dimars
(cognate)