Notes: The PWC form has a frequent labial prefix *b(ǝ)-. The etymology seems both phonetically and semantically satisfactory. We must note that the Av. final -i more often goes back to *-ē (in this case we would have *č́:, not *ǯ́ in PWC); sometimes, however, it may reflect the nominal suffix *-Vj, which is probably the case here.
