Found 2 items, similar to banefully.
English → English (WordNet) Definition: banefully banefully adv : in a noxiously baneful way; “this banefully poisoned climate” [syn: perniciously]
English → English (gcide) Definition: Banefully Baneful \Bane"ful\, a. Having poisonous qualities; deadly; destructive; injurious; noxious; pernicious. “Baneful hemlock.” --Garth. “Baneful wrath.” --Chapman. [1913 Webster] -- Bane"ful*ly, adv. --Bane"ful*ness, n. [1913 Webster]