Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Khasi
khun
→
Bahnar
kon
(cognate)
→
Khmer
កូន
(cognate)
→
Pnar
khon
(cognate)
→
Thavung
กอน
(cognate)
→
Vietnamese
con
(cognate)