The phrase "art one's back" refers to the act of bending or curving one's spine forward, usually as a sign of submission or defeat. Antonyms for this phrase would be "stand tall" or "stand straight." These phrases indicate a confident and upright posture, showing that one is unyielding and unafraid. Other antonyms could include "assert oneself" or "hold one's ground," both of which suggest a strong and resolute stance. Similarly, phrases like "take control" or "hold one's head high" imply a sense of power and authority, contrasting with the subservience implied by "art one's back.
