Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
пла́вати
→
Belarusian
плаваць
(cognate)
→
Ukrainian
пароплав
(affix)
→
Ukrainian
плавець
(affix)