Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
пропаст
←
Bulgarian
про-
(prefix)
←
Bulgarian
паст
(prefix)
←
Bulgarian
паст
(link)
←
Proto-Slavic
*propastь
(inherited)