Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Belarusian
цвёрды
←
Old East Slavic
твьрдъ
(inherited)
←
Russian
твёрдый
(cognate)
←
Proto-Slavic
*tvьrdъ
(inherited)