Related Clues:
- Not at all superficial
- Tough to fathom
- Fraught with meaning
- Rife with meaning
- Dark and rich, as color
- Benchley best-seller (with ''The'')
- Like the Mariana Trench
- Benchley novel "The __"
- Far beneath the surface
- Strongly felt
- Multilayered
- Not easily understood
- Profoundly philosophical
- Like ocean trenches
- Like Hail Mary passes