Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Buryat
дуун
←
Mongolian
дуу
(cognate)
←
Kalmyk
дун
(cognate)
←
Proto-Mongolic
*dawu-n
(inherited)
→
Buryat
дуулаха
(suffix)