unreasonable
un-rea-son-a-ble
adjective
Not fair, sensible, or based on good judgement; excessive or extreme.
"His demands were completely unreasonable."
Thesaurus
Synonyms: undue, counterintuitive, unjustified, unwarranted, mindless, reasonless, senseless, indefensible, untenable, immoderate, excessive, inordinate
Antonyms: reasonable, sensible