a solid or hollow sphere or ovoid, especially one that is kicked, thrown, or hit in a game., courage; nerve., testicles.

have someone by the balls, play ball, on the ball

Formal and Informal Expressions of balls

In different contexts, you can replace 'balls' with suitable alternatives. In a more formal setting, 'spheres' is apt. In informal speech or writing, 'nuts' is a commonplace synonym.

balls: Explore its Definition & Usage

balls Definition

1a solid or hollow sphere or ovoid, especially one that is kicked, thrown, or hit in a game.
2courage; nerve.
3testicles.

Using balls: Examples

Take a moment to familiarize yourself with how "balls" can be used in various situations through the following examples!

Example
He kicked the ball into the goal.
Example
It takes balls to stand up to a bully.
Example
The boxer was hit in the balls and fell to the ground.

balls Synonyms and Antonyms

Synonyms for balls

sphere
orb
globe
nuts
testicles

Phrases with balls

have someone by the balls
to have complete control or power over someone
Example
The boss had the employee by the balls and could make him do anything.
play ball
to cooperate or participate in something
Example
If you want to succeed in this company, you need to play ball with the management.
on the ball
alert, competent, and efficient
Example
She's always on the ball and never misses a deadline.

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Summary: balls in Brief

The term 'balls' [bɔːlz] refers to a solid or hollow sphere used in games, as well as courage or nerve. It can also refer to testicles. Phrases like 'have someone by the balls' denote control, while 'play ball' means to cooperate. 'On the ball' describes someone who is alert and efficient.