Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Esperanto
Suomio
←
Esperanto
-o
(affix)
←
Finnish
Suomi
(derived)
→
Esperanto
suomo
(back-formation)