The word "undeceptive" implies honesty, transparency, and straightforwardness. Its antonyms, therefore, would suggest the opposite. The word "deceptive" is an obvious antonym, denoting dishonesty, trickery, or misleading behavior. Other antonyms could include words such as "manipulative," "sly," "dishonest," or "misleading." These terms all suggest a level of cunning or attempts to obscure the truth, something that is diametrically opposed to the notion of being "undeceptive." Ultimately, it is crucial to identify which traits or behaviors most closely align with the opposite of being "more undeceptive," as this can help individuals recognize areas in which they may need to improve their honesty or transparency in their personal or professional lives.