Related Clues:

• Bottomless pit
• Deep cavity
• Bottomless gulf
• Vast gulf
• Immeasurable void
• Yawning gulf
• Deep gulf
• Hell
• It's immeasurably deep
• Deep, dark pit
• Deep cavity, poetically
• Wide gulf
• Yawning gulf (Var.)
• Wide gulf, poetically
• Bottomless pit accessed through baby's mouth