Where does “dʰworom” come from?

dʰworom (Proto-Indo-European) comes from Proto-Indo-European dʰwor-, from Proto-Indo-European dʰwer- — door.

Ancestry of “dʰworom”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	dʰwor-	door, gate; doorway, door, gate
2	Proto-Indo-European	dʰwer-	door

dʰworom — Etymology, Origin & Word History | Etymology Explorer