Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Kalmyk
цаңһх
←
Buryat
сангаха
(cognate)
←
Mongolian
цангах
(cognate)
←
Proto-Mongolic
*haŋga-
(derived)
→
Buryat
сангаха
(cognate)
→
Mongolian
цангах
(cognate)