Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*pěkrъ
→
Czech
pěkný
(inherited)
→
Polish
piękny
(inherited)
→
Slovak
pekný
(inherited)