Thesaurus.com
Dictionary.com
Showing results for nefarious. Search instead for nefari.
Definitions

nefarious

[ni-fair-ee-uhs] / nɪˈfɛər i əs /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Here, siblings Mario and Luigi team with Princess Peach and Toad on an interstellar adventure and face off against the nefarious fire-breathing Bowser and his son.

From The Wall Street Journal • Mar. 29, 2026

But agents have to be given powerful permissions to do their jobs, and we are already seeing this being exploited in potentially nefarious ways in what are called prompt injection attacks.

From Barron's • Feb. 17, 2026

A nefarious hacker could have easily installed a virus on to my machine without me having to do anything.

From BBC • Feb. 12, 2026

Sometimes, one sibling feels entitled to more and will use nefarious means to get it.

From MarketWatch • Feb. 2, 2026

Pike could not answer what White wanted to know most: Was Hale merely protecting Bryan, or was he part of a more intricate, nefarious design?

From "Killers of the Flower Moon" by David Grann