English Lexicon

Nefarious

/nɪˈfɛər.i.əs/
adjectiveCEFR C2 (Proficient)Top #8500 frequency
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Comprehensive Definitions & Senses

1 sense
As adjective
  1. 1

    Wicked, villainous, or criminal.

    "The detective uncovered a nefarious plot to defraud the elderly."

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Linguistic Origin & Historical Etymology

Derived from the Latin adjective 'nefarius', stemming from 'nefas' meaning 'wrong, crime, or sin', which combines the negative prefix 'ne-' with 'fas' meaning 'right or divine law'. It entered the English language in the early 17th century, retaining its strong association with wickedness and criminal intent.

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