Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
comércio
←
Latin
commercium
(borrowed)
←
Latin
com-
(mention)
←
Latin
merx
(mention)
→
Portuguese
anticomércio
(affix)