The antonyms for "more undissembled" could include words like deceptive, insincere, artificial, fake, dishonest, or phony. These terms refer to a lack of honesty or genuineness, and instead suggest that something or someone is hiding true intentions or reality. Whereas "more undissembled" is synonymous with transparency, authenticity, and sincerity, these antonyms suggest a pretense or falsehood. When someone or something is characterized by these antonyms, it can be difficult to trust them and may warrant closer investigation. Ultimately, understanding the opposite meanings of words like "undissembled" can help us communicate more clearly and ensure we are being truthful in our interactions.