Related Clues:

• Muted
• Not talkative
• Restraining order
• Peace partner
• Low in decibels
• Librarian's request
• Partner of peace
• "Shush!"
• Library demand
• "Shhh!"
• "Zip it!"
• Ironic thing to shout
• Noiseless
• Calm, hushed
• Tranquil, calm