Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
по́рох
→
Belarusian
порах
(cognate)
→
Russian
прах
(doublet)
→
Russian
порошок
(affix)
→
Russian
пороховой
(affix)