Related Clues:

• Steady
• Mollify
• Make quiet
• Quiet
• 'Don't panic!'
• Soothe
• "Chill out!"
• Exhortation for a panicky person
• Immobilize, as a sailboat
• Make relaxed
• ''Chill out!''
• ''Chill!''
• "Don't panic!"
• 'Stop panicking!'
• Make quiet or still - sounds like an order