Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Vietnamese
lòn
←
Proto-Mon-Khmer
*lɔːn
(inherited)
←
Proto-Mon-Khmer
*lun
(inherited)
←
Proto-Mon-Khmer
*luən
(mention)
←
Proto-Mon-Khmer
*lən
(mention)
←
Vietnamese
luồn
(link)