Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
лѣто
←
Proto-Slavic
*lěto
(inherited)
→
Lower Sorbian
lěto
(cognate)
→
Romanian
letopiseț
(derived)
→
Russian
лето
(mention)