Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Tai
*doŋᴮ
→
Thai
ทุ่ง
(inherited)
→
Zhuang
doengh
(inherited)
→
Chinese
古洞
(cognate)