Related Clues:
- Benchley novel "The __"
- Far beneath the surface
- Strongly felt
- Multilayered
- Not easily understood
- Profoundly philosophical
- Like ocean trenches
- Like Hail Mary passes
- Like the diving-board end
- "Star Trek: ___ Space Nine"
- Far from shallow
- Flowing back
- Not superficial
- Like the diver's end of the pool
- Tough to grasp