Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
общий
←
Old Church Slavonic
обьщь
(borrowed)
←
Russian
о́бчий
(doublet)
←
Proto-Slavic
*obьťь
(derived)