nefarious
/nɪˈfɛəɹi.əs/ adjective
- adjective Sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics. “Aliens have a nefarious connotation in many science fiction books.”
Synonyms
evil iniquitous sinister underhanded vile good-for-nothing abandoned arrant bad bad apple bad seed baleful scurrilous baneful base black-hearted dark deleterious demonic depraved villainous
Etymology
From Latin nefārius (“execrable, abominable”), from nefās (“something contrary to divine law, an impious deed, sin, crime”), from ne- (“not”) + fās (“the dictates of religion, divine law”), which is related to Latin for (“to speak, to say”) and cognate to Ancient Greek φημί (phēmí, “to say”).
Webster’s 1913
- adjective Wicked in the extreme; abominable; iniquitous; atrociously villainous; execrable; detestably vile.
Etymology [L. nefarius, fr. nefas crime, wrong; ne not + fas divine law; akin to fari to speak. See No, adv., and Fate.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “nefarious”, CC BY-SA 4.0. Details