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