re·dound /rɪˈdaʊnd/
 (vi.)增加,貢獻,有助于,回報
 Re·dound v. i. [imp. & p. p. Redounded; p. pr. & vb. n. Redounding.]
 1. To roll back, as a wave or flood; to be sent or driven back; to flow back, as a consequence or effect; to conduce; to contribute; to result.
 The evil, soon
 Driven back, redounded as a flood on those
 From whom it sprung.   --Milton.
    The honor done to our religion ultimately redounds to God, the author of it.   --Rogers.
    both . . . will devour great quantities of paper, there will no small use redound from them to that manufacture.   --Addison.
 2. To be in excess; to remain over and above; to be redundant; to overflow.
 For every dram of honey therein found,
 A pound of gall doth over it redound.   --Spenser.
 Re·dound, n.
 1. The coming back, as of consequence or effect; result; return; requital.
 We give you welcome; not without redound
 Of use and glory to yourselves ye come.   --Tennyson.
 2. Rebound; reverberation. [R.]
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 redound
      v 1: be excessive in quantity
      2: be deflected; "His actions redound on his parents"
      3: be added; "Everything he does redounds to himself"
      4: have an effect for good or ill; "Her efforts will redound to
         the general good"