Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
що
←
Proto-Indo-European
*kʷid
(inherited)
←
Proto-Indo-European
*kʷis
(mention)
←
Proto-Slavic
*čьto
(inherited)
→
Bulgarian
нещо
(affix)
→
Bulgarian
защо
(affix)
→
Bulgarian
нищо
(affix)