vivac
vi-√ vac P. -vakti (rarely Ā. ), to, declare, announce, explain, solve (a question), RV. ; ŚBr. ; to decide, Yājñ., Sch. (in explaining vivAka ); to discuss, impugn, MBh. ; ( Ā. ) to speak variously or differently, dispute with one another about ( loc. ), RV.