Kept or done in secret, often in order to conceal an illicit or improper purpose.

秘密的，暗中的保密的或秘密进行的，常为隐藏一个非法的或不正当的目的。

youdao

The burden of proof shall be upon the corporation to establish that the inspection such director seeks is for an improper purpose.

并且公司负有举证责任，确定该要求查验系出于不适当的目的。

youdao

I made this confirmation to confirm above facts, for the purpose of validating my signature as witness on above Power of Attorney in good faith and not for any other improper purpose.

我作为此确认以确认以上所陈事实，以便真诚地确保我的见证人签字有效，并无其他不正当目的。

youdao

The lawyer who helps you set it up can also be charged with obstructing the IRS, with up to three years' imprisonment -- if the government believes that he knew you had an improper purpose.

FORBES: Dirty pool

Should congress or state legislatures intervene like some states have and make it a crime to impersonate another person or entity on a website for an improper purpose or should the marketplace of ideas provide any needed check and balance?

FORBES: Was Greenpeace's Shell Hoax Brilliant Or 'Villainous'? One Of The Guys Behind It All Speaks.

The purpose of the Amy Hestir Student Protection Act is to prevent school employees from engaging in improper sexual conduct with students, but the ban on website communication is a broad measure that extends far beyond this purpose.

FORBES: Why Missouri's Ban on Teacher-Student Facebook Friendships Is Doomed