1. 不合适的，不适当的，不妥当的
2. 错误的，不正确的
3. 不道德的
4. 不合礼仪的，不成体统的，不得体的
5. 不正当的
6. 不合标准的
7. 不规则的
8. 不登大雅的，下流的，亵渎的
9. 不诚实的
10. 不正派的
11. 非正常的，不正常的
12. 不切实际的

1. =impropriate

1. not suitable or right or appropriate;

   "slightly improper to dine alone with a married man"
   "improper medication"
   "improper attire for the golf course"
   

2. not conforming to legality, moral law, or social convention;

   "an unconventional marriage"
   "improper banking practices"
   

3. not appropriate for a purpose or occasion;

   "said all the wrong things"
   

1.不正当的;非法的
improper activities are illegal or dishonest.

e.g. 25 officers were investigated following allegations ofimproper conduct during the murder inquiry...
25 名警察在被指控于调查谋杀案期间有非法行为之后受到调查。
e.g. Mr Matthews maintained that he had done nothingimproper.
马修斯先生坚称他没有做过非法的事情。

2.不合适的;不适当的
improper conditions or methods of treatment are not suitable or good enough for a particular purpose.

e.g. Theimproper use of medicine could lead to severe adverse reactions.
用药不当会产生严重的不良反应。

3.不成体统的;不得体的
If you describe someone's behaviour asimproper, you mean that it is rude or shocking.

e.g. He would never beimproper, he is always the perfect gentleman.
他总是举止得体,一直是个完美的绅士。

1. 不恰当：保证市场公平是与投资者保护紧密联系在一起的,尤其体现在:(1)防止不恰当(improper)交易,如市场操纵、内部人交易等;(2)保证投资者公平地获得进人市场的渠道和市场或价格信息?

2. improper是什么意思

2. 不正当：后者侧重侦查机关之鼓动、唆使(instigation)行为,即警察之权力是否正当使用,是否以不正当(improper)、过度(excessive)方法引诱不准备不情愿犯罪之人犯罪.

3. 不适当：如在英国,滥用自由裁量权即指不适当(improper)或不合理(irreasonable )地行使自由裁量权,(注:(英)n.斯蒂文森著<>, 高家伟译<>,<>1995年第1期,第63-64页.