Tending to cause death or serious injury; deadly: a pernicious virus. (adjective)
Causing great harm; destructive: pernicious rumors. (adjective)
Archaic Evil; wicked.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "pernicious" in a sentence
"It is time to undertake the reform of what I call a pernicious prejudice."
"My eyes overflow, my dear Pauline; and Maitland will chide me for indulging what he calls a pernicious sensibility."
"It skews consumption and investment in pernicious ways."