temerity       
noun [ U ]  formal disapproving uk/təˈmer.ə.ti/ us/təˈmer.ə.t̬i/
 鲁莽;冒失
a willingness to do or say something that shocks or upsets other people
  [ + to infinitive ] She had the temerity to call me a liar. 她竟冒失地说我是骗子。 
 Synonym: audacity