from
The Collaborative International Dictionary of English v.0.48
Pernicious \Per*ni"cious\, a. [L. perniciosus, from pernicies
destruction, from pernecare to kill or slay outright; per +
necare to kill, slay: cf. F. pernicieux. Cf. {Nuisance},
{Necromancy}.]
Having the quality of injuring or killing; destructive; very
mischievous; baleful; malicious; wicked.
[1913 Webster]
Let this pernicious hour
Stand aye accursed in the calendar. --Shak.
[1913 Webster]
Pernicious to his health. --Prescott.
[1913 Webster]
Syn: Destructive; ruinous; deadly; noxious; injurious;
baneful; deleterious; hurtful; mischievous.
[1913 Webster] -- {Per*ni"cious*ly}, adv., --
{Per*ni"cious*ness}, n.
[1913 Webster]