impetuous

/im-ˈpe-chᵊ-wəs/

Middle English, from Anglo-French, from Late Latin impetuosus, from Latin impetus seeimpetus

adjective

  1. marked by impulsive vehemence or passion

  2. marked by force and violence of movement or action

an impetuous temperament

precipitate headlong abrupt impetuous sudden mean showing undue haste or unexpectedness. precipitate stresses lack of due deliberation and implies prematureness of action. headlong stresses rashness and lack of forethought.