alleviation
  減輕,緩和,鎮痛物
  al·le·vi·a·tion /-ˌlɪvɪˈeʃən/ 名詞
  Al·le·vi·a·tion n.
  1. The act of alleviating; a lightening of weight or severity; mitigation; relief.
  2. That which mitigates, or makes more tolerable.
     I have not wanted such alleviations of life as friendship could supply.   --Johnson.
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  alleviation
       n 1: the feeling that comes when something burdensome is removed
            or reduced; "as he heard the news he was suddenly
            flooded with relief" [syn: relief, assuagement]
       2: the act of reducing something unpleasant (as pain or
          annoyance); "he asked the nurse for relief from the
          constant pain" [syn: easing, easement, relief]