Thwack (verb)

To strike something with a sharp, heavy blow, making a loud noise.

Origin:

The origin of the word thwack is not clear, it is thought to be imitative of the sound of a hard blow.

Examples:

1. He thwacked the ball with his racket, sending it flying across the court.
2. The door was closed with a loud thwack.
3. He gave the door a thwack with his hand.
4. The sound of the axe hitting the tree was a loud thwack.
5. She gave the table a good thwack with her hand to get everyone's attention.