Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*h₁el-(h₁)en-
→
Old Church Slavonic
ѥлень
(derived)
→
Russian
олень
(derived)
→
Ukrainian
олень
(derived)