Related Clues:

• When repeated, not to be repeated
• Mum's the word
• "Pipe down!"
• Stunned response
• Let up, as a storm
• Stillness
• Teacher's command
• "Quiet!"
• Lessen gradually
• 'Quiet down!'
• 'Shut your mouth!'
• Command to Sweet Charlotte
• "Silence"
• Be silent
• 'Don't say a word!'