sadist:
(plural: ‘sadists‘; for the right pronunciation of this word, please click here)
a person who gets pleasure, mostly sexual pleasure, from giving physical or mental pain or suffering to others;
a person with extreme aggressive and cruel behaviour,
a sadist (L) getting pleasure out of beating the stars out of the other (R)
Jane had not realised that her boyfriend was a sadist until he started causing pain to her and then laughed when she suffered.
Some people call those people who give them some inconvenience or being harsh with them or make fun of them, not realising that sadist is a person with far more serious psychological disorder than an ordinary teaser, bully or even a disciplinarian.
While some sadists get pleasure out of inflicting sever physical pain on others, some other sadists get pleasure by making others suffer mentally with severe anxiety or depression.
