Related Clues:

• Hardly superficial
• Not allowing light to pass through
• Not translucent
• Not at all clear
• Like the sea
• Like some pockets
• Low in pitch
• Difficult to fathom
• Hard to see through
• Up to one's eyeballs
• Like a basso's voice
• Oceanic
• Like a basso profundo
• Word before freeze or fry
• Not at all superficial