acerb /əˈsɝb, æ-/
  (a.)酸澀的,尖銳的,刻薄的
  A·cerb a.  Sour, bitter, and harsh to the taste, as unripe fruit; sharp and harsh.
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  acerb
       adj 1: sour or bitter in taste [syn: acerbic, astringent, sharp]
       2: harsh or corrosive in tone; "an acerbic tone piercing
          otherwise flowery prose"; "a barrage of acid comments";
          "her acrid remarks make her many enemies"; "bitter words";
          "blistering criticism"; "caustic jokes about political
          assassination, talk-show hosts and medical ethics"; "a
          sulfurous denunciation" [syn: acerbic, acid, acrid,
          bitter, blistering, caustic, sulfurous, sulphurous,
           venomous, virulent, vitriolic]