Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
польѕа
←
Proto-Slavic
*polьdza
(derived)
←
Proto-Slavic
*po
(mention)
←
Proto-Slavic
*lьga
(mention)