The phrase "breaks back" typically means to cause serious injury or harm to someone's spine or back. Antonyms, on the other hand, are words that have opposite meanings to each other. Some antonyms for "breaks back" may include "heals back," "strengthens back," "supports back," or "protects back." These phrases imply actions that aid in restoring or preventing harm to the back. Heals back means to recover from a back injury, and strengthens the back means to exercise and develop the muscles for better back support. A supportive chair, good posture habits, and using proper lifting techniques can also protect one's back from harm.