Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*polnъ
→
Czech
planý
(inherited)
→
Polish
płonny
(inherited)
→
Russian
полый
(mention)
→
Old Czech
planý
(inherited)