Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
дѣтѧ
←
Proto-Slavic
*dětę
(inherited)
→
Old Church Slavonic
дѣти
(link)
→
Upper Sorbian
dźěćo
(cognate)