Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
març
←
Latin
mārtius
(inherited)
→
Catalan
marcenc
(suffix)
→
Catalan
marçal
(suffix)
→
Catalan
marcer
(suffix)
→
Romanian
marț
(cognate)