Antonyms of adj debatable

3 senses of debatable

Sense 1
debatable, problematic, problematical -- (open to doubt or debate; "If you ever get married, which seems to be extremely problematic")

INDIRECT (VIA questionable) -> unquestionable -- (incapable of being questioned; "unquestionable authority")

Sense 2
arguable, debatable, disputable, moot -- (open to argument or debate; "that is a moot question")

INDIRECT (VIA controversial) -> uncontroversial, noncontroversial -- (not likely to arouse controversy)

Sense 3
debatable, disputable -- (capable of being disproved)

INDIRECT (VIA contestable) -> incontestable, incontestible -- (incapable of being contested or disputed)

Similarity of adj debatable

3 senses of debatable

Sense 1
debatable, problematic, problematical -- (open to doubt or debate; "If you ever get married, which seems to be extremely problematic")
       => questionable (vs. unquestionable) -- (subject to question; "questionable motives"; "a questionable reputation"; "a fire of questionable origin")

Sense 2
arguable, debatable, disputable, moot -- (open to argument or debate; "that is a moot question")
       => controversial (vs. uncontroversial) -- (marked by or capable of arousing controversy; "the issue of the death penalty is highly controversial"; "Rushdie's controversial book"; "a controversial decision on affirmative action")

Sense 3
debatable, disputable -- (capable of being disproved)
       => contestable (vs. incontestable) -- (capable of being contested)