Antonyms of adj arguable

2 senses of arguable

Sense 1
arguable -- (capable of being supported by argument)

INDIRECT (VIA plausible) -> implausible -- (having a quality that provokes disbelief; "gave the teacher an implausible excuse")

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)

Similarity of adj arguable

2 senses of arguable

Sense 1
arguable -- (capable of being supported by argument)
       => plausible (vs. implausible) -- (apparently reasonable and valid, and truthful; "a plausible excuse")

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")