conceitedly       
adverb  disapproving uk/kənˈsiː.tɪd.li/ us/kənˈsiː.t̬ɪd.li/
 自负地,自大地,自以为是地
in an unpleasantly proud way
  He smiled conceitedly, folding his arms behind his back. 他得意地笑了笑,双手背在身后。 
 I could say, quite conceitedly, that no other candidate had a better record. 我可以相当自负地说,没有其他候选人比我有更好的记录。 
 See: conceited
 - More examples
 - "Good!" said Mr Pumblechook conceitedly.
 - Conceitedly, I figured to myself that I could have done better.
 - Chamberlain was conceitedly confident that he was doing the right thing.