Other forms: fists
Want to hit a punching bag? First you need to curl your fingers into your palm to make a fist, or a clenched hand.
You might make a fist and bump it against your friend's as a greeting, or use it to clutch something tightly: "She held the balloon in one fist, and an ice cream cone in the other." Fists are also used to punch hard, and a fist fight is a serious physical altercation. When we trace this word back to its origin, we find a closely related root meaning "five," for the five fingers of a hand.