Bane·ful a. Having poisonous qualities; deadly; destructive; injurious; noxious; pernicious. “Baneful hemlock.” --Garth. “Baneful wrath.” --Chapman.
-- Bane*ful*ly, adv. --Bane*ful*ness, n.
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banefully
adv : in a noxiously baneful way; "this banefully poisoned
climate" [syn: perniciously]