108: < OIA busa ‘chopped straw; chaff; husks’; cf. Hindi and Nepali bhus, bhūs M
Vekerdi's etymology
132: < Sanskrit *bhuṣa [Turner]
Turner's etymology
9271
Other etymologies
Kuiper (1948: 98): Sanskrit busa- N ‘chaff’, buśa-, buṣa, būṣa, Pali bhusa- ‘chaff of corn’, [...] Romani phus may be derived from the Proto-Mundic root *wα-ḍα
Mayrhofer's etymology
II, 229–30: busa- N ‘Spreu, Abfall’: origin “bleibt ungesichert”