Most contriving means planning or scheming in a deceptive manner. The antonyms for this phrase are open, frank, and honest. When someone is being open, they are expressing themselves in a straightforward and genuine way, without any hidden intentions or ulterior motives. Being frank means speaking the truth clearly and directly, without any concealment or evasion. And when someone is honest, they are showing integrity and sincerity in their actions, statements, and attitudes. Therefore, the antonyms for most contriving are traits of transparency, sincerity, and candor, where individuals are open, frank, and honest about their thoughts, feelings, and intentions.