- pernicious
- I(New American Roget's College Thesaurus)adj. malign, ruinous, poisonous, detrimental, injurious, harmful; wicked. See badness.II(Roget's IV) modif.Syn. harmful, deleterious, detrimental, noxious, baneful, damaging, prejudicial, ruinous, destructive, insidious, hurtful, malignant, sinister, virulent, deadly, fatal, lethal, poisonous, venomous, unwholesome; see also deadly 1 , harmful , poisonous .Syn.- pernicious applies to that which does Great harm by insidiously undermining or weakening [pernicious anemia, a pernicious dogma ] ; baneful implies a harming by or as if by poisoning [ a baneful superstition ] ; noxious refers to something that is injurious to physical or mental health [noxious fumes ] ; deleterious implies slower, less irreparable injury to the health [ the deleterious effects of an unbalanced diet ] ; detrimental implies a causing of damage, loss, or disadvantage to something specified [ the speech was detrimental to our cause ]III(Roget's 3 Superthesaurus) (VOCABULARY WORD) a.[pur NISH us]destructive, deadly, very harmful.The pernicious disease affected halfthe community.SYN.: destructive, lethal, deadly, fatal, harmful, ruinous, injurious, hurtful, devastating, mortal, noxious, malignant.ANT.: harmless, benign, innocuousIV(Roget's Thesaurus II) adjective 1. Extremely destructive or harmful: baneful, deadly, malignant, noxious, pestilent, pestilential, virulent. See HELP. 2. Having the capability or effect of damaging irreparably: destructive, ruinous. See HELP.
English dictionary for students. 2013.