Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
пра́здник
→
Old Church Slavonic
праздьникъ
(cognate)
→
Russian
праздничный
(affix)
→
Russian
праздничек
(affix)