Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*urokъ
→
Bulgarian
урок
(inherited)
→
Polish
urok
(inherited)
→
Russian
урок
(inherited)
→
Russian
оурокъ
(inherited(ru/cu))
→
Ukrainian
урок
(inherited)