Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Mon-Khmer
*rk(aw)ʔ
→
Khmer
អង្ករ
(inherited)
→
Pnar
khoo
(derived)