Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
единый
←
Old Church Slavonic
ѥдинъ
(derived)
←
Russian
-ый
(affix)
←
Russian
оди́н
(cognate)