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

He also knew how police think. So,he did not hide the letter where he knew they would look for it.

VOA: special.2009.12.26

The idea was that if the public knew what a criminal looked like, it would be harder for that person to hide.

VOA: special.2010.05.05

But it can often hide meaning.

VOA: special.2010.04.30

Be honest with your family. You can't hide from it.

VOA: standard.2009.12.04