Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
обо
←
Proto-Indo-European
*h₃ebʰi
(inherited)
←
Proto-Slavic
*o(b)
(inherited)
→
Russian
о
(link)