Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*nekъ
→
Bulgarian
нека
(inherited)
→
Serbo-Croatian
nek
(inherited)
→
Serbo-Croatian
neka
(inherited)
→
Serbo-Croatian
нека
(inherited)