Related Clues:

• Tranquility
• Stillness
• Controlled
• Levelheaded
• Absence of turbulence
• '___ is knowing that your worst shot is still pretty good': golfer Johnny Miller
• Period of inactivity
• Tranquilize
• Storm antecedent
• Hard to fluster
• Far from flustered
• Imperturbable
• Sedated
• Not nervous
• It may precede a storm