Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Belarusian
-ар
←
Russian
-арь
(cognate)
←
Proto-Slavic
*-ařь
(inherited)
→
Belarusian
бібліятэкарка
(affix)