au·dac·i·ty /ɔˈdæsəti/
 大膽,厚顏
 Au·dac·i·ty n.
 1. Daring spirit, resolution, or confidence; venturesomeness.
    The freedom and audacity necessary in the commerce of men.   --Tatler.
 2. Reckless daring; presumptuous impudence; -- implying a contempt of law or moral restraints.
    With the most arrogant audacity.   --Joye.
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 audacity
      n 1: fearless daring [syn: audaciousness, temerity]
      2: aggressive boldness or unmitigated effrontery; "he had the
         audacity to question my decision" [syn: audaciousness]