improper
adjective uk/ɪmˈprɒp.ər/ us/ɪmˈprɑː.pɚ/
(DISHONEST)
formal违法的，违规的，不正当的
dishonest and against a law or a rule
The governor has denied making improper use of state money. 州长否认非法挪用州政府的资金。
(WRONG)
formal不适当的，不合适的；错误的
unsuitable or not correct for a particular use or occasion
improper prescription of medicines 错误的药方
Is it considered improper to wear such a short skirt to a formal occasion? 正式场合穿这么短的裙子是不是不合适？
Synonyms: inappropriateirregular (RULE) unacceptableunbecomingungentlemanlyunladylikeunprofessionalunsuitable
(RUDE)
（在性方面）粗鲁的，不能为社会接受的，不成体统的
related to sex in a way that is rude or socially unacceptable
I trust you're not making improper suggestions to my husband! 我希望你不是在挑逗我丈夫！