Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
нощ
←
Proto-Indo-European
*nókʷts
(inherited)
←
Proto-Slavic
*noťь
(inherited)
→
Bulgarian
снощи
(cognate)
→
Bulgarian
нощен
(suffix)