Fist (noun)

1. The hand with the fingers clenched in the palm, as for striking or grasping.
2. A clenched hand used as a symbol of defiance or solidarity.

Origin:

Old english fyst, of west germanic origin; related to dutch vuist and german faust.

Examples:

1. He made a fist to show his determination.
2. He hit the wall with his fist.
3. The crowd raised their fists in protest.
4. She clenched her fist in anger.
5. He made a fist and knocked on the door.