Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
юница
←
Old Church Slavonic
юница
(inherited)
←
Proto-Slavic
*junъ
(derived)
←
Proto-Slavic
*junę
(cognate)