Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*durьnъ
→
Belarusian
дурны
(inherited)
→
Lithuanian
durnas
(derived)
→
Polish
durny
(inherited)
→
Russian
дурной
(inherited)
→
Ukrainian
дурний
(inherited)