Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
сме́ртный
→
Belarusian
смяротны
(cognate)
→
Russian
смертность
(affix)
→
Ukrainian
смертний
(cognate)