impropriety
🇺🇸
/ˌɪmprəˈpraɪəti/
🇬🇧
/ˌɪmprəˈpraɪəti/
Something that is not right or not suitable, especially in a professional or moral way.
The teacher was shocked by the student's behavior, which was a clear case of impropriety.
老师对学生的行为感到震惊,这是一个明显的不当行为案例。