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pernicious

per·ni·cious

pernicious

 
 
pronunciation:
pr nI shs
features:
Word Parts
part of speech: adjective
definition: having a very harmful or fatal effect; injurious, deadly, or destructive.
Rabies is a pernicious disease caused by a virus.
antonyms:
innocuous
similar words:
destructive, malign, malignant, noxious, pestilent
derivations: perniciously (adv.), perniciousness (n.)