un·der·val·ue /-ˈvæl(ˌ)ju/
  (vt.)低估…之價值,低估,看輕
  Un·der·val·ue v. t.
  1. To value, rate, or estimate below the real worth; to depreciate.
  2. To esteem lightly; to treat as of little worth; to hold in mean estimation; to despise.
     In comparison of it I undervalued all ensigns of authority.   --Atterbury.
     I write not this with the least intention to undervalue the other parts of poetry.   --Dryden.
  Un·der·val·ue, n. A low rate or price; a price less than the real worth; undervaluation.
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  undervalue
       v 1: assign too low a value to; "Don't underestimate the value of
            this heirlooom-you may sell it at a good price" [syn: underestimate]
            [ant: overvalue, overvalue]
       2: esteem lightly
       3: lose in value; "The dollar depreciated again" [syn: depreciate,
           devaluate, devalue] [ant: appreciate]