mordacious
  (a.)辛辣的,銳利的,咬的
  Mor·da·cious a.  Biting; given to biting; hence, figuratively, sarcastic; severe; scathing. -- Mor*da*cious*ly, adv.
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  mordacious
       adj 1: capable of wounding; "a barbed compliment"; "a biting
              aphorism"; "pungent satire" [syn: barbed, biting,
              nipping, pungent]
       2: biting or given to biting; "they deliberately gave me a
          skittish and mordacious mount"