The word "un-dissembled" refers to something that is truthful, honest, and without any deception. Antonyms for this word would include: "dissembled," "deceptive," "false," "dissimulated," and "hypocritical." Dissembled means to hide one's true feelings, intentions, or beliefs. Deceptive refers to something that is intended to mislead or trick. False means something that is not true or genuine. Dissimulated means to conceal one's thoughts or feelings. Hypocritical refers to someone who is insincere or pretends to be virtuous while behaving in the opposite way. These antonyms all suggest a lack of authenticity or sincerity in contrast to the genuine quality of "un-dissembled.