Related Clues:

• 'Quiet!'
• 'Hush!'
• 'Put a lid on it!'
• Be quiet
• Refuse to talk
• 'Shush!'
• Refuse to speak
• "Hush!"
• Become silent
• ''Don't say a word!''
• Zip one's lip
• Button one's lip
• 'I can't hear myself think!'
• "Shh!" from a plumber?
• Not say a word