Nefarious means evil, harmful, or criminal. When you say that someone is nefarious, you mean that they are doing something very bad and harmful.
The politician is very nefarious, because he is trying to get votes by any means necessary.
The company is doing nefarious things, because they are cheating on their tests.
adjective
extremely wicked
Synonyms:
1
The deltions and complaints are not nefarious.
2
The purpose is not necessarily nefarious.
3
He is the greedy and nefarious leader.
4
The political goons ceased in their nefarious activities.
5
The word nefarious is creeping into my mind.
6
It's part of my nefarious background in the US Navy.
7
He was one of the most nefarious of Roman emperors.
8
I have to cross the River Tamar by nefarious means.
9
The city of Hyderabad is rife with the nefarious activities of land mafia.
10
This is partially due to the nefarious box office slump in 2005.