Where does “苯教” come from?

苯教 (Chinese) comes from Tibetan བོན, from Tibetan འབོད — to call; to shout.

Ancestry of “苯教”, step by step

Step	Language	Word	Meaning
1	Tibetan	བོན	to express, to mutter; to ask; to give, to offer
2	Tibetan	འབོད	to call; to shout

苯教 — Etymology, Origin & Word History | Etymology Explorer