Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
merces
←
Latin
merx
(mention)
→
Latin
commercium
(mention)
→
Norman
merci
(mention)
→
Norman
mercie
(mention)
→
Norman
mèrcénaithe
(mention)
→
Occitan
mercé
(derived)