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