NEFARIOUS
nefarious, villainous
(adjective) extremely wicked; “nefarious schemes”; “a villainous plot”; “a villainous band of thieves”
Source: WordNet® 3.1
Etymology
Adjective
nefarious (comparative more nefarious, superlative most nefarious)
Sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.
Synonyms: evil, iniquitous, sinister, underhanded, vile, good-for-nothing, Thesaurus:evil
Usage notes
• Commonly used in contexts involving villainous plans, conspiracies, or actions.
Source: Wiktionary
Ne*fa"ri*ous, a. Etym: [L. nefarius, fr. nefas crime, wrong; ne not +
fas divine law; akin to fari to speak. See No, adv., and Fate.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition