The Collaborative International Dictionary
Banefulness
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.
Wiktionary
banefulness
n. The state or quality of being baneful.