Simple Definition of pernicious
: causing great harm or damage often in a way that is not easily seen or noticed
Examples of pernicious in a sentence
The notion that poll data are a legitimate form of news has to be one of the most pernicious tenets of late-twentieth-century American journalism … —Barbara Ehrenreich, Nation, 20 Nov. 1995
The more it [the Papacy] took part in the temporal conflicts with consistently pernicious result, the more impotent among the monarchs it revealed itself … —Barbara W. Tuchman, The March of Folly, 1984
At its most pernicious, paper entrepreneurialism involves little more than imposing losses on others for the sake of short-term profits for the firm. —Robert B. Reich, Atlantic, March 1983
More pernicious still has been the acceptance of the author's controversial ideas by the general public.
the pernicious effects of jealousy
She thinks television has a pernicious influence on our children.
Origin of pernicious
Middle English, from Anglo-French, from Latin perniciosus, from pernicies destruction, from per- + nec-, nex violent death — more at noxious
First Known Use: 15th century
Synonym Discussion of pernicious
PERNICIOUS Defined for Kids
Definition of pernicious for Students
: causing great damage or harm <a pernicious disease> <a pernicious habit>
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