Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
оулоучити
←
Old Church Slavonic
оу
(prefix)
←
Old Church Slavonic
лоучити
(prefix)
←
Proto-Slavic
*lučiti
(inherited)