Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Chittagonian
ঠাঁই
→
Assamese
ঠাই
(cognate)
→
Bengali
ঠাঁঁই
(cognate)
→
Bengali
ঠাঁই
(cognate)