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nefarious

adjective
 
 
/nəˈfeə.ri.əs/ US  /-ˈfer.i-/ formal

Definition

(especially of activities) morally bad: The director of the company seems to have been involved in some nefarious practices/activities.Morally wrong and evilDishonest nefariously
 
 
/-li/ adverb
nefariousness
 
 
/-nəs/ noun [U]
(Definition of nefarious adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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