The word "most dissembling" can be described by various antonyms that carry opposite meanings. "Most honest" would be an antonym for "most dissembling" as it expresses the quality of being free from deceit or fraud. "Transparent" would also be an antonym as it refers to being open or candid, without any hidden intentions or motives. Similarly, an antonym for "most dissembling" could be "authentic" as it describes something that is genuine, true, and not falsified. Another antonym could be "sincere" as it denotes the quality of being truthful and genuine, without any intention of deceiving others.