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.”