nefarious Meaning, Definition & Usage

  1. adjective satellite extremely wicked
    villainous.
    • nefarious schemes
    • a villainous plot
    • a villainous band of thieves

WordNet

Ne*fa"ri*ous adjective
Etymology
L. nefarius, fr. nefas crime, wrong; ne not + fas divine law; akin to fari to speak. See No, adv., and Fate.
Definitions
  1. Wicked in the extreme; abominable; iniquitous; atrociously villainous; execrable; detestably vile. Syn. -- Iniquitous; detestable; horrible; heinious; atrocious; infamous; impious. See Iniquitous. -- Ne*fa"ri*ous*ly, adv. -- Ne*fa"ri*ous*ness, n.

Webster 1913