- unreasonable
- adj1. irrational, senseless, illogical, without reason, without rhyme or reason; foolish, silly, childish, unintelligent; unwise, unsensible, unreflective, witless, mindless, thoughtless; insensate, reckless, injudicious, indiscreet, imprudent; shortsighted, myopic, undiscerning, unperceiving; moronic, idiotic, Sl. dumb, stupid, fatuous; crazy, mad, brainless, imbecilic, Sl. dippy, Sl. batty, Sl. balmy, Sl. wacky, Sl. goofy.2. arbitrary, temperamental, whimsical, capricious, notional, fanciful; harebrained, quirky, moody; discretionary, willful, nonrational, self-willed; inconsistent, erratic, crotchety, bumptious.3. preposterous, absurd, ludicrous, ridiculous, nonsensical; meaningless, unscientific, sophistical, unsound; fallacious, groundless, invalid, fallible; unthinkable, inconceivable, out of the question, impossible; incredible, unbelievable, implausible, untenable; doubtable, doubtful, dubitable, questionable.4. excessive, immoderate, exorbitant, extravagant, Sl. all outdoors; undue, extortionate, unconscionable, unfair, unjust, overpriced; overmuch, uncalled-for, outrageous, inordinate; prohibitive, out of bounds, out of sight.
A Note on the Style of the synonym finder. 2014.