Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Mongolian
арзгар
←
Buryat
арзагар
(cognate)
←
Mongolian
(suffix)
←
Mongolian
гар
(suffix)
←
Kalmyk
арзһр
(cognate)
←
Proto-Mongolic
*arja-
(derived)