Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bengali
অন্ধকার
←
Bengali
আঁধার
(doublet)
←
Sanskrit
अन्धकार
(borrowed)
→
Bengali
আঁধার
(doublet)