Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*borti
→
Bulgarian
боря
(inherited)
→
Macedonian
борба
(suffix)
→
Macedonian
борец
(suffix)
→
Russian
борец
(affix)