Where does “भीतरी” come from?

भीतरी (Hindi) comes from Hindi भीतर, from Sauraseni Prakrit ??????.

भीतरी (Hindi): inner

Definitions

Step	Language	Word	Meaning
1	Hindi	भीतर	inside; included, part of; inside, inner part
2	Sauraseni Prakrit	??????	—

भीतरी — Etymology, Origin & Word History | Etymology Explorer