Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
воедино
←
Old Church Slavonic
въ
(affix)
←
Old Church Slavonic
ѥдинъ
(affix)
←
Old Church Slavonic
-о
(affix)