The phrase "works oneself to the bone" refers to someone who is so dedicated and hard-working that they become exhausted and burnt out. Antonyms for this phrase would be words that convey the opposite meaning, such as "relax," "rest," "unwind," and "take it easy." These words suggest a slower pace, a focus on self-care, and a break from work. Other antonyms may include "idle," "lazy," "procrastinate," or "slack off," indicating a lack of effort or dedication. It is important to maintain a balance between work and rest to avoid burnout, which can negatively affect physical and mental health.