Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
Vodnic
←
Old Church Slavonic
водьникъ
(borrowed)
←
Old Church Slavonic
вода
(affix)
←
Old Church Slavonic
-ьникъ
(affix)