Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
бꙑстръ
←
Proto-Slavic
*bystrъ
(inherited)
→
Romanian
Bistra
(mention)
→
Romanian
Bistrița
(affix)
→
Romanian
Bistreț
(derived)
→
Romanian
Bistrețu
(derived)