/ˌɪmprəˈpraɪɪtɪ/ n.( 复improprieties)1.(indecency)+of behaviour不适当；不得体；不合礼节；不雅
sexual impropriety不适当的性行为
2.(improper act)+of expression不妥行为；不当使用
They felt that it would be an impropriety to break the silence.他们意识到, 打破沉默是不适宜的举止。
He resigned amid allegations of financial impropriety.他在财务作假的质疑声中辞职了。
3.(improper state)不合适；不适当；不正当
the impropriety of publicly reading private letters公然阅读私人信件的不当行为