Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*pakъ
→
Bulgarian
пак
(inherited)
→
Old Church Slavonic
пакꙑ
(inherited)
→
Macedonian
пак
(inherited)
→
Serbo-Croatian
pak
(inherited)