Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
врата
←
Proto-Slavic
*vorta
(inherited)
→
Old Church Slavonic
вратьникъ
(suffix)
→
Russian
врата
(borrowed)