abyss uh-BISS noun WS #1

a deep or seemingly bottomless chasm; an immeasurably profound depth or void

1. The diver peered into the dark abyss beneath the surface of the ocean.
2. She was pulled down into an abyss of despair.
3. The canyon formed a vast abyss between the mountain ranges.
4. After his wife died, he fell into an abyss of grief.
5. Scientists studied the creatures living near the ocean abyss.