Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
мозък
←
Proto-Balto-Slavic
*masgas
(inherited)
←
Proto-Indo-European
*mosgʰos
(inherited)
←
Proto-Slavic
*mozgъ
(inherited)