demon
//ˈdiːmən//
Noun
demonSingular
demonsPlural
1
An evil spirit or devil, especially one thought to possess a person or act as a tormentor in hell.
In medieval times, people believed that demons could possess the souls of the living.
2
A cruel or destructive person or force.
He was a demon on the battlefield, showing no mercy to his enemies.
3
An inner source of torment, compulsion, or anxiety.
She struggled with her inner demons for years before seeking help.
4
A person who is extremely skilled or energetic at something.
She's a demon at chess and rarely loses a game.