"Throwing in the sponge" is an idiomatic expression that means giving up or surrendering. There are several antonyms or opposite words for this term, including persisting, persevering, continuing, enduring, and fighting. Instead of resigning and admitting defeat, a person can choose to persist and persevere in the face of challenges. They can continue to endure and fight for their goals, refusing to give up or surrender. These antonyms for "throwing in the sponge" highlight the importance of determination, resilience, and perseverance in achieving success and overcoming obstacles.