Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Mongolian
ес
←
Proto-Mongolic
*yersü(n)
(inherited)
→
Mongolian
ер
(link)
→
Kalmyk
йисн
(cognate)