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English definition of “nefarious”

nefarious

adjective uk   /nəˈfeə.ri.əs/ us    /-ˈfer.i-/ formal
(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
adverb uk   /-li/ us  
nefariousness
noun [U] uk   /-nəs/ us  
(Definition of nefarious from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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