nefarious

Nefarious is an adjective used to describe actions, schemes, or people that are wicked, criminal, or morally wrong. In formal or literary contexts it conveys strong disapproval and is more elevated than everyday terms like evil or unethical. It is typically applied to deliberate, morally unacceptable conduct rather than accidental wrongdoing.

The word derives from Latin nefarius, from nefas meaning “crime, impiety,” with fas meaning “divine law” or what is permitted. The English form nefarius, later nefarious, appeared in the 17th century, and today the term is common in journalism, fiction, and formal commentary, though it remains a strong, sometimes rhetorical term.

In usage, nefarious modifies deeds, schemes, plots, or actors: nefarious deeds, nefarious schemes, nefarious actors. It is not typically used for minor or ambiguous wrongdoing. Synonyms include wicked, villainous, criminal, and dastardly, but nefarious carries a particular moral judgment and sense of intent. In criticism, it can be perceived as sensational or overused when applied too broadly. Example sentences: The journalist exposed a nefarious scheme to siphon funds from the charity. The villain’s nefarious plot was foiled by undercover investigators.