a. [ L. nefarius, fr. nefas crime, wrong; ne not + fas divine law; akin to fari to speak. See No, adv., and Fate. ] Wicked in the extreme; abominable; iniquitous; atrociously villainous; execrable; detestably vile. [ 1913 Webster ]
Syn. -- Iniquitous; detestable; horrible; heinious; atrocious; infamous; impious. See Iniquitous. [ 1913 Webster ]
-- Ne*fa"ri*ous*ly, adv. -- Ne*fa"ri*ous*ness, n. [ 1913 Webster ]