Hang

Hang on — To keep something.

“When everyone else was getting fired, Paul managed to hang on to his job.”

Hang out — To spend time with someone, casually.

“My friends and I used to hang out in the park after school.”

Hang up — To end a call on the phone, especially if it’s before the other person is ready.

“I was in the middle of a sentence, and he hung up on me! How rude.”