Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
кре́пость
→
Belarusian
крэпасць
(cognate)
→
Russian
крепостца
(suffix)
→
Russian
крепостной
(affix)
→
Votic
kreeposti
(derived)