The phrase "says uncle" typically means to surrender or give up in a conflict or struggle. Some antonyms for this phrase include persevere, resist, fight, endure, and overcome. When facing a difficult situation, it may be tempting to give up and "say uncle," but choosing to persevere or resist can lead to personal growth and long-term success. Additionally, fighting for a just cause or enduring through tough times can build character and resilience. Ultimately, the opposite of "saying uncle" is standing up for oneself and maintaining a positive attitude even in the face of adversity.