Where does “*barm” come from?

*barm (Proto-West Germanic) comes from Proto-Germanic barmaz, from Indo-European *bʰer-.

Ancestry of “*barm”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	barmaz	lap; bosom
2	Indo-European	*bʰer-	—

*barm — Etymology, Origin & Word History | Etymology Explorer