Related Clues:

• ''Stop right there!''
• 'That's enough out of you!'
• Restraining order?
• 'All right already!'
• ''Pipe down!''
• 'Knock it off!'
• Silencer
• Librarian's admonishment
• "Shh!"
• Moviegoer's reprimand
• "That'll do!"
• Lullaby word
• It'll shut you up
• It can fall over a crowd
• Breath-holding crowd reaction