Give Away

to give something to someone without expecting anything in return, often because you no longer need or want it

I'm going to give away my old clothes to charity.

She gave away her tickets to the concert because she couldn't go.

to reveal a secret or surprise

The ending of the movie was given away by the trailer.

Don't give away the surprise party, it's a secret!

to surrender or yield something, often unwillingly

The team gave away the game in the last minute.

She gave away her rights to the property.