Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*boľь
→
Bulgarian
бол
(inherited)
→
Bulgarian
болка
(derived)
→
Macedonian
болка
(derived)
→
Slovak
bôľ
(inherited)
→
Slovincian
bȯ́u̯l
(inherited)