Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Pnar
ksu
←
Proto-Khasian
*ksuː
(inherited)
←
Khasi
ksiew
(cognate)
←
Proto-Mon-Khmer
*cuuʔ
(derived)