The word "unprincipled" can be described as lacking integrity or moral values. The opposite of unprincipled would be principled, which means acting with integrity, following moral beliefs, and being honest. Ethical, honorable, and righteous are some synonyms of principled. In contrast, synonyms for unprincipled include deceitful, dishonest, and unethical. The antonyms of unprincipled are essential for distinguishing between good and bad behavior. Principled behavior builds trust, respect, and long-lasting positive relationships, whereas unprincipled behavior causes harm, distrust, and hurtful relationships. In summary, choosing to act with principles and integrity is crucial for positive personal and social outcomes.