/ ʌnˈriːznəbl; NAmE / adjective
not fair; expecting too much :
The job was beginning to make unreasonable demands on his free time.
The fees they charge are not unreasonable.
It would be unreasonable to expect somebody to come at such short notice.
He was being totally unreasonable about it.
OPP reasonable
► un·rea·son·able·ness noun [ U ]
► un·rea·son·ably / -əbli; NAmE / adverb