im·pet·u·ous /ɪmˈpɛʧwəs, ˈpɛʧə-/
  (a.)衝動的,猛烈的,輕率的,急躁的
  Im·pet·u·ous a.
  1. Rushing with force and violence; moving with impetus; furious; forcible; violent; as, an impetuous wind; an impetuous torrent.
     Went pouring forward with impetuous speed.   --Byron.
  2. Vehement in feeling; hasty; passionate; violent; as, a man of impetuous temper.
  The people, on their holidays,
  Impetuous, insolent, unquenchable.   --Milton.
  Syn: -- Forcible; rapid; hasty; precipitate; furious; boisterous; violent; raging; fierce; passionate.
  -- Im*pet*u*ous*ly, adv. -- Im*pet*u*ous*ness, n.
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  impetuous
       adj 1: characterized by undue haste and lack of thought or
              deliberation; "a hotheaded decision"; "liable to such
              impulsive acts as hugging strangers"; "an impetuous
              display of spending and gambling"; "madcap escapades";
              (`brainish' is archaic) [syn: hotheaded, impulsive,
               madcap, tearaway(a), brainish]
       2: marked by violent force; "impetuous heaving waves"