clandestine
adj. 秘密的，私下的；偷偷摸摸的
例句
It's clandestine, but you'll surf with greater anonymity.
这是秘密的，但你会更多的以匿名方式冲浪。
The demand for the clandestine product would be substantially reduced.
对这种秘密产品的需求将大幅减少。
Their clandestine mission: to get you to the fun faster.
他们的秘密使命就是使你尽快找到乐儿。
