effrontery n.厚顏無恥 ( 冒失狂妄 ) ＝impudence＝temerity
【反】decorum ( n.禮貌；得體 ) ；deference ( n.尊重；順從 ) ；timidity ( n.膽怯 )

【記】ef去掉，front臉面→去掉臉面→厚顏無恥