Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Kalmyk
дун
←
Mongolian
дуу
(cognate)
→
Buryat
дуун
(cognate)
→
Kalmyk
дуулх
(link)