Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Kalmyk
нүдн
←
Mongolian
нүд
(cognate)
←
Dongxiang
nudun
(cognate)
←
Proto-Mongolic
*nidün
(inherited)
→
Mongolian
нүд
(cognate)
→
Dongxiang
nudun
(cognate)