Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Kumyk
кёк
←
Kumyk
гёк
(doublet)
←
Proto-Turkic
*kȫk
(inherited)
→
Kumyk
гёк
(doublet)