Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Mon-Khmer
*rmaas
→
Chong
มาด
(inherited)
→
Khmer
រមាស
(inherited)
→
Thai
ระมาด
(derived)