Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*věrьnъ
→
Bulgarian
верен
(inherited)
→
Czech
věrný
(inherited)
→
Macedonian
верен
(inherited)
→
Polish
wierny
(inherited)