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.
Let this pernicious hour
Stand aye accursed in the calendar.
Shak.
Pernicious to his health.
Prescott.
Syn. -- Destructive; ruinous; deadly; noxious; injurious;
baneful; deleterious; hurtful; mischievous.
-- Per*ni"cious*ly, adv., --
Per*ni"cious*ness, n.
Per*ni"cious (?), a. [L. pernix,
-icis.] Quick; swift (to burn). [R.]
Milton.