The word "compromising" means "to put oneself or others in a difficult or compromising situation." Antonyms for the word "compromising" could include terms like "uncompromising," "unyielding," "rigid," "inflexible," or "unbending." These words describe a steadfast or unshakeable stance, one that refuses to give ground, even in the face of difficult circumstances or opposing views. Other antonyms might include "bold," "confident," "assured," or "resolute," which connote a sense of strength and certainty in one's beliefs. Overall, the antonyms for "most compromising" suggest a steadfast, confident, and unwavering character, one that values principles and stands strongly by them, regardless of the consequences.