Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Buryat
мэдэхэ
←
Mongolian
мэдэх
(cognate)
←
Kalmyk
медх
(cognate)
←
Proto-Mongolic
*mädä-kü
(inherited)