Where does “भूतनी” come from?

भूतनी (Hindi) comes from Hindi भूत, from Sanskrit भूत, from Proto-Indo-Iranian bʰuHtás, from Proto-Indo-European bʰuH-tó-s, from Proto-Indo-European bʰuH- — to become, grow, appear.

भूतनी (Hindi): female ghost

Definitions

female ghost

Ancestry of “भूतनी”, step by step

Step	Language	Word	Meaning
1	Hindi	भूत	ghost, spirit; an ugly man
2	Sanskrit	भूत	been
3	Proto-Indo-Iranian	bʰuHtás	become, been
4	Proto-Indo-European	bʰuH-tó-s	—
5	Proto-Indo-European	bʰuH-	to become, grow, appear

Every word from Proto-Indo-European bʰuH- →Every word from Proto-Indo-European bʰuH-tó-s →Every word from Proto-Indo-Iranian bʰuHtás →