Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
пуст
←
Proto-Slavic
*pustъ
(inherited)
→
Bulgarian
пустиня
(affix)
→
Bulgarian
пущинак
(cognate)