What is the antonym of the word ‘buy’ ?

sell

The antonym of the word buy is sell.

• Buy means to acquire something by paying money for it.
• Sell means to transfer the ownership of something in exchange for money.

The other words do not have the same meaning as buy and are therefore not antonyms.

• Purchase means to buy something.
• Gain means to acquire something, especially as a result of effort or good fortune.
• Trade means to exchange goods or services for other goods or services.