Found 2 items, similar to nefariously.
English → English (WordNet) Definition: nefariously nefariously adv : in a nefarious manner or to a nefarious degree; “nefariously involved in a conspiracy”
English → English (gcide) Definition: Nefariously Nefarious \Ne*fa"ri*ous\, 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]