Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bengali
আর
←
Sanskrit
अपर
(inherited)
→
Assamese
আৰু
(cognate)
→
Bengali
আরও
(compound)
→
Garo
aro
(borrowed)