Related Clues:

• Still
• Mollify
• 'Quiet!'
• 'Hush!'
• Muzzle
• 'Not another word!'
• 'Put a lid on it!'
• The sound of silence
• 'Pipe down!'
• Quiet
• 'Can it!'
• Stop talking
• 'Stop your gabbin'!'
• Silence
• Theater admonition