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 this sunken city, the researchers found a stone carving that is thought to be an Atlantean soldier.

VOA: special.2011.04.26

The Food and Drug Administration says there would be no need for special labeling if the salmon is found to have the same basic contents as other fish.

VOA: special.2010.10.05

Though a large percentage of those victims are yet to be identified, DNA testing is making it increasingly possible to determine the identity of remains found in unmarked graves.

VOA: standard.2009.12.18