Say uncle is a phrase that means to surrender or give up. However, it is not always necessary to use this phrase when you want to show refusal or resist. Some antonyms for say uncle could be resist, persevere, endure, or persist. When someone tells you to say uncle, you can choose to resist and hold onto your beliefs or decision. You can also persevere and continue to work towards your goals. Enduring challenges and overcoming obstacles is another way to show the opposite of saying uncle. Finally, you might persist and keep pushing forward despite the pressure to give up. By resisting, persevering, enduring and persisting, you can refuse to say uncle and achieve your goals.