Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Thai
กระได
←
Proto-Tai
*ɗrwajᴬ
(inherited)
←
Thai
บันได
(doublet)
→
Thai
บันได
(doublet)