The word "un-disputable" means something that is undeniable, absolute, or cannot be challenged. Therefore, its antonyms would be disputable, uncertain, questionable, debatable, or ambiguous. Disputable refers to something that is open to debate or contention, and there are contrary opinions on the matter. Uncertain means that something is not definite or reliable, and there is a lack of confidence in its accuracy. Questionable suggests that something is suspicious or shady, and there are doubts about the truthfulness or legality of it. Debatable refers to something that is controversial or subject to argument, and there are differing perspectives on the topic. Ambiguous describes something that is unclear, vague, or has multiple interpretations, making it difficult to determine its meaning or intention.