Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bengali
-খান
←
Assamese
-খন
(cognate)
←
Sanskrit
खण्ड
(derived)
→
Assamese
-খন
(cognate)