Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bengali
বাঁ
←
Assamese
বাওঁ
(cognate)
←
Bengali
বাম
(doublet)
←
Sanskrit
वाम
(derived)