Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*někъto
→
Serbo-Croatian
neko
(mention)
→
Serbo-Croatian
netko
(mention)
→
Slovene
nekdo
(mention)