Synonyms of unreasonable

Adjective

1. unreasonable (vs. reasonable), counterintuitive, indefensible, untenable, mindless, reasonless, senseless, undue, unjustified, unwarranted, illogical#1, unlogical, immoderate, irrational

usage: not reasonable; not showing good judgment

2. excessive, inordinate, undue, unreasonable, immoderate (vs. moderate)

usage: beyond normal limits; "excessive charges"; "a book of inordinate length"; "his dress stops just short of undue elegance"; "unreasonable demands"

Definition and meaning of unreasonable (Dictionary)