Antonyms for the phrase "putting one over on" could include being honest, transparent, forthright, or truthful. Instead of trying to deceive or manipulate someone, these terms suggest a more genuine and direct exchange of information or ideas. Other suggestions might include being sincere, candid, open, or frank. Ultimately, these antonyms emphasize the importance of being sincere and forthright in our interactions with others, rather than attempting to gain an unfair advantage or manipulate those around us. By embracing these values, we can build more authentic and trusting relationships with those around us, and ultimately create stronger and more positive communities.