Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bengali
বা
←
Hindi
वा
(cognate)
←
Sanskrit
वा
(borrowed)
→
Assamese
বা
(cognate)
→
Garo
ba
(derived)