Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Belarusian
радасны
←
Belarusian
ра́дасць
(affix)
←
Belarusian
-ны
(affix)
←
Russian
ра́достный
(cognate)