Most put-on means something that is artificial or insincere. Its antonyms are genuine, honest, natural, and sincere. When people are being genuine, they are not fake, and their behavior reflects their true feelings. Honesty is another antonym that implies that someone is truthful and is not pretending to be someone they're not. Being natural is the opposite of most put-on, as it means not being artificial or forced. Sincerity is when someone is genuine and means what they say without any hidden agenda. Using antonyms for most put-on can help describe people or situations that are authentic and true, rather than fake or insincere.