Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bengali
মিতা
←
Bengali
মিত্র
(doublet)
←
Proto-Indo-Iranian
*mitrás
(inherited)
←
Proto-Indo-Aryan
*mitrás
(inherited)
←
Sanskrit
मित्र
(inherited)
→
Bengali
মিত্র
(doublet)