pernicious meaning
Synonym Discussion of PERNICIOUS. pernicious, baneful, noxious, deleterious, detrimental mean exceedingly harmful. pernicious implies irreparable harm done through evil or insidious corrupting or undermining. baneful implies injury through poisoning or destroying.noxious applies to what is both offensive and injurious to the health of a body or mind.xamples of PERNICIOUS. 1  More pernicious still has been the acceptance of the author's controversial ideas by the general public. 2  the pernicious effects of jealousy. 3  She thinks television has a pernicious influence on our children.