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impetuous

/ɪmˈpɛtʃuəs/ · im.pet.u.ous
adjective
  1. Given to acting on impulse; rash and hasty. She made an impetuous decision to quit her job and travel the world.
noun
  1. A sudden, impulsive movement or action. The impetuous dash of the horse through the finish line surprised everyone.
Did you know? The word 'impetuous' has been used to describe the actions of famous historical figures, such as Napoleon Bonaparte, who was known for his impetuous decisions on the battlefield.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 14, 2026