Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
скѫдъ
→
Old Church Slavonic
скѫдость
(suffix)
→
Old Church Slavonic
скѫдьльникъ
(suffix)
→
Russian
скудный
(cognate)