Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*opakъ
→
Lithuanian
apuokas
(cognate)
→
Serbo-Croatian
opak
(inherited)
→
Serbo-Croatian
опак
(inherited)