To give away (something valuable) to get at least a possibility of gaining something else of value (such as self-respect, trust, love, freedom, prosperity), or to avoid an even greater loss.
To trade (a value of higher worth) for something of lesser worth in order to gain something else valued more, such as an ally or business relationship, or to avoid an even greater loss; to sell without profit to gain something other than money.
To intentionally give up (a piece) in order to improve one’s position on the board.
To advance (a runner on base) by batting the ball so it can be fielded, placing the batter out, but with insufficient time to put the runner out.
To sell at a price less than the cost or actual value.