at Vin.ii.88 is perhaps a der. fr. vi + vac, and not pac, thus representing a Sk. *vivācyatā, meaning “challenging in disputation,” quarrelsomeness, provocation See also *[vipāceti](/define/vi …

…with indignation “-See remarks under khīyati & cp.; vipaccatā.

Caus. of vi + pac, or…