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Dictionary

per•ni•cious

Pronunciation: (pur-nish'us), [key]
—adj.
1. causing insidious harm or ruin; ruinous; injurious; hurtful: pernicious teachings; a pernicious lie.
2. deadly; fatal: a pernicious disease.
3. Obs.evil; wicked.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

pernancy

pernicious anemia

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