Related Clues:

• ''Pipe down!''
• Librarian's admonishment
• "Shh!"
• Moviegoer's reprimand
• Lullaby word
• It'll shut you up
• It can fall over a crowd
• Breath-holding crowd reaction
• ''Zip your lip!''
• ''No talking!''
• "Quiet, you!"
• Theater injunction
• 'Quiet'
• Proctor's warning
• ''Shh!''