Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
obscuro
←
Latin
obscūrus
(affix)
←
Latin
-o
(affix)
←
Latin
(affix)
→
English
obscurantism
(mention)