Reference: DEEP AND DEPTHS
American
The deep, or the great deep, signifies in Scripture, hell, the place of punishment, the bottomless pit, Lu 8:31, compare Re 9:1; 11:7; the grave, Ro 10:7; the deepest parts of the sea, Ps 69:15; 107:26; chaos in the beginning of the world, Ge 1:2. See HELL.
See Verses Found in Dictionary
Now the earth was without shape and empty, and darkness was over the surface of the watery deep, but the Spirit of God was moving over the surface of the water.
Don't let the current overpower me! Don't let the deep swallow me up! Don't let the pit devour me!
They reached up to the sky, then dropped into the depths. The sailors' strength left them because the danger was so great.
And they began to beg him not to order them to depart into the abyss.
or "Who will descend into the abyss?" (that is, to bring Christ up from the dead).
Then the fifth angel blew his trumpet, and I saw a star that had fallen from the sky to the earth, and he was given the key to the shaft of the abyss.
When they have completed their testimony, the beast that comes up from the abyss will make war on them and conquer them and kill them.