Antonyms for reasonable

Antonyms of adj reasonable

3 senses of reasonable

Sense 1:

reasonable (vs. unreasonable), sensible

unreasonable (vs. reasonable)
counterintuitiveindefensible, untenablemindless, reasonless, senselessundue, unjustified, unwarranted

Sense 2:

fair, fairish, reasonable

INDIRECT (VIA moderate) -> immoderate

Sense 3:

reasonable, sane

INDIRECT (VIA rational) -> irrational