Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Assamese
পিতা
←
Assamese
পিতৃ
(doublet)
←
Proto-Indo-Iranian
*pHtā́
(derived)
←
Early Assamese
পিতা
(inherited)
←
Proto-Indo-European
*ph₂tḗr
(derived)
←
Sanskrit
पितृ
(derived)