Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
войник
←
Proto-Slavic
*vojьna
(inherited)
←
Proto-Slavic
*-ъkъ
(mention)
←
Proto-Slavic
*-ikъ
(mention)