Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
rétroactif
←
French
rétro-
(affix)
←
French
actif
(affix)
→
English
retroactive
(mention)
→
French
rétroactivement
(suffix)
→
French
rétroactivité
(suffix)
→
Romanian
retroactiv
(borrowed)