Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
обоюдоострый
←
Russian
обою́дный
(affix)
←
Russian
-о-
(affix)
←
Russian
о́стрый
(affix)