¹sudden

precipitate, headlong, abrupt, impetuous, sudden mean showing undue haste or unexpectedness. precipitate stresses lack of due deliberation and implies prematureness of action <the army's precipitate withdrawal>. headlong stresses rashness and lack of forethought <a headlong flight from arrest>. abrupt stresses curtness and a lack of warning or ceremony <an abrupt refusal>. impetuous stresses extreme impatience or impulsiveness <an impetuous lover proposing marriage>. sudden stresses unexpectedness and sharpness or violence of action <flew into a sudden rage>.