Related Clues:

• Calmness, in slang
• School of experiential wisdom
• Opposite of turbulent
• Phlegmatic
• Sailboat stopper
• Give Valium to, e.g.
• Enlightened state
• Calm, so to speak
• Librarian's request
• Relaxed and tranquil
• Sailor's nightmare
• One with the universe, so to speak
• Meditator's school
• Buddhist school
• Not having big waves