Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Khmer
សុញ្ញ
→
Khmer
សូន្យ
(doublet)
→
Lao
ສູນ
(cognate)
→
Thai
สูญ
(cognate)