pernicious adj
1. exceedingly harmful [syn: baneful, deadly, pestilent]
2. working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease"; "a subtle poison" [syn: insidious, subtle]

Pernicious \Per*ni"cious\, a. [L. pernix, -icis.] Quick; swift (to burn). [R.] --Milton.

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. 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.

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Death is the termination of the biological functions that sustain a living organism. The word refers both to the particular processes of life's cessation as well as to the condition or state of a formerly living body. Phenomena which commonly bring about death include predation, malnutrition, accidents resulting in terminal injury, and disease.

The nature of death has been for millennia a central concern of the world's religious traditions and of philosophical enquiry, and belief in some kind of afterlife or rebirth has been a central aspect of religious belief. In modern scientific enquiry, the origin and nature of consciousness has yet to be fully understood; any such view about the existence or non-existence of consciousness after death therefore remains speculative.

The word death comes from Old English deað, which in turn comes from Proto-Germanic dauthaz (reconstructed by etymological analysis). This comes from the Proto-Germanic stem dheu- meaning the 'Process, act, condition of dying'.

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