unreasonable

un- +‎ reason +‎ -able

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unreasonable (comparative more unreasonable, superlative most unreasonable)

1. Without the ability to reason; unreasoning.
   • c. 1594, William Shakespeare, Romeo and Juliet, Act III, Scene 3,

     Hold thy desperate hand:

     Art thou a man? thy form cries out thou art:

     Thy tears are womanish; thy wild acts denote

     The unreasonable fury of a beast:

     Unseemly woman in a seeming man!

2. Not reasonable; going beyond what could be expected or asked for.
   • 1611, King James Version of the Bible, Acts 25:27,

     For it seemeth to me unreasonable to send a prisoner, and not withal to signify the crimes laid against him.

   • 1792, Mary Wollstonecraft, A Vindication of the Rights of Woman, Chapter 11,

     The will of those who never allow their will to be disputed, unless they happen to be in a good humour, when they relax proportionally, is almost always unreasonable.

• reasonable

• unreasonableness
• unreasonably