Longman Dictionary of Contemporary English homepage

unreasonable

adjective
     
un‧rea‧son‧a‧ble
1 not fair or sensible:
I think he's being unreasonable.
Don't let your boss make unreasonable demands on you.
it is unreasonable to do something
It's unreasonable to expect you to work seven days a week.
It's not unreasonable to ask him to help you.
2 unreasonable prices, costs etc are too high
unreasonably adverb:
unreasonably high prices

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