thought·less /-ləs/
  (a.)沒有考慮的,無深慮的,輕率的
  Thought·less, adv.
  1. Lacking thought; careless; inconsiderate; rash; as, a thoughtless person, or act.
  2. Giddy; gay; dissipated. [R.]
  3. Deficient in reasoning power; stupid; dull.
     Thoughtless as monarch oaks that shade the plain.   --Dryden.
  -- Thought*less*ly, adv. -- Thought*less*ness, n.
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  thoughtless
       adj 1: showing lack of careful thought; "the debate turned into
              thoughtless bickering" [ant: thoughtful]
       2: marked by or paying little heed or attention; "We have
          always known that heedless self-interest was bad morals;
          we know now that it is bad economics"--Franklin D.
          Roosevelt; "heedless of danger"; "heedless of the child's
          crying" [syn: heedless, unheeding] [ant: heedful]
       3: without care or thought for others; "the thoughtless saying
          of a great princess on being informed that the people had
          no bread; `Let them eat cake'" [syn: uncaring, unthinking]
       4: (usually followed by `of') without due thought or
          consideration; "careless of the consequences"; "the
          proverbial grasshopper--thoughtless of tomorrow";
          "crushing the blooms with regardless tread" [syn: careless(p),
           thoughtless(p), regardless]