The term 'Hebrew Underworld' refers to the concept of Sheol, which is a Hebrew word meaning 'GRAVE' or 'PIT'. It is a place of darkness and silence where all the dead go, regardless of their moral standing. In the Bible, it is described as a place of no return, where the souls of the dead are cut off from God and cannot be redeemed. Sheol is also sometimes referred to as the 'abode of the dead' or the 'land of forgetfulness'.