Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
обчий
←
Old East Slavic
обьчии
(inherited)
←
Russian
о́бщий
(doublet)
←
Proto-Slavic
*obьťь
(derived)