Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
су́мерки
→
Bulgarian
сумрак
(cognate)
→
Russian
сумеречный
(affix)
→
Serbo-Croatian
sumrak
(cognate)