Insubmissive, meaning refusing to submit or obey authority, has several antonyms. One such antonym is submissive, which means compliant or obedient. Others include obedient, tractable, and deferential. These words all suggest a willingness to follow rules or authority without question. Conversely, antonyms that reflect an independent or rebellious spirit include insubordinate, defiant, and rebellious. These words denote a propensity to resist orders or authority out of principle or defiance. However, in certain contexts, words like assertive, self-directed, or independent might be used as antonyms of insubmissive to suggest a strong sense of self-determination and self-rule without necessarily defying authority.