Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
contágio
←
Latin
contāgium
(derived)
→
Portuguese
contagiar
(affix)
→
Portuguese
contagioso
(affix)
→
Portuguese
anticontágio
(affix)