Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Mongolic
*arca
→
Mongolian
арц
(inherited)
→
Tatar
арча
(derived)
→
East Yugur
hrca
(inherited)