It means to hide something or put it where it will not be found.

这个词的意思是藏起什么东西，或把它放到一个永远不会被发现的地方。

youdao

More sinisterly, there are the fossils that will not be found.

更悲剧的是，还有一些不会被发现的化石。

youdao

This indicates that the class could not be found in the project.

这意味着在项目中不能找到该类。

youdao

One of these is deep-six. It means to hide something or put it where it will not be found.

VOA: special.2009.05.24

In Crane, the emphasis is not on what is lost in modernity but what is found or what might be.

在克莱恩看来，重点不是现代性丧失了什么,而在于新的发现或可能性。

耶鲁公开课 - 现代诗歌课程节选

We can think about these things; our mind can grasp them, but they're not to be found in this world.

我们可以思考这些东西,我们的心灵可以感受它们,但是在现实世界中我们找不到

耶鲁公开课 - 死亡课程节选

The type of fund or style you desire might not be found within the fund family.

FORBES: Mutual Funds: Brand Names Vs. House Brands

Fixes issues that could cause Time Machine to state the backup volume could not be found.

ENGADGET: Mac OS X 10.5.6 now available via Software Update

It heard a cause of death could not be found as their bodies were decomposed.

BBC: Dead Eastbourne couple 'lived in isolation'