Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Arem
puờn
←
Proto-Mon-Khmer
*punʔ
(inherited)
←
Proto-Vietic
*poːnʔ
(inherited)
←
Vietnamese
bốn
(cognate)