Related Clues:

• Without sound
• ''Hush!''
• Serenity found in 17-, 26-, 42- and 54-Across
• Sight from a Malibu beach
• Unworried
• Muted
• Not talkative
• Meditative practice
• Meditation subject
• Type of garden
• Blissful-looking
• Stress-free
• Mahayana branch
• Way to enlightenment
• Staid