Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
дык
←
Old East Slavic
тако
(inherited)
←
Old East Slavic
такъ
(mention)
←
Russian
так
(mention)
←
Proto-Slavic
*tako
(derived)
←
Proto-Slavic
*takъ
(derived)