Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
почити
←
Proto-Slavic
*počiti
(inherited)
→
Bulgarian
почивам
(derived)
→
Bulgarian
почивш
(cognate)