Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
щека́
→
Belarusian
шчака
(cognate)
→
Russian
пощёчина
(affix)
→
Ukrainian
щока
(cognate)