妄もう断だん

noun, noun or participle which takes 'suru'

reckless decision; rash judgment

A formal or literary term for a hasty, ill-considered decision or conclusion. Often used in critical or self-critical contexts.

• 彼かれの妄もう断だんがプロジェクトを失しっ敗ぱいさせた。

  His reckless decision caused the project to fail.

• 十じゅう分ぶんな情じょう報ほうもないのに妄もう断だんするべきではない。

  You should not make a rash judgment without sufficient information.