Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
Rogna
←
Old Church Slavonic
рогьна
(borrowed)
←
Old Church Slavonic
рогъ
(affix)
←
Old Church Slavonic
-ьнъ
(affix)