спокойствие

• calm, calmness; quiet; quietness; tranquility; stillness; ease; placidity
• (самообладание) composure
• невъзмутимо СПОКОЙСТВИЕ unruffled calm, placidity
• душевно СПОКОЙСТВИЕ peace of mind
• на СПОКОЙСТВИЕ at leisure, at ease
• запазвам СПОКОЙСТВИЕ keep calm; keep a level head; keep o.'s countenance
• оставям на СПОКОЙСТВИЕ leave alone
• Разговорно
• keep o.'s shirt/hair on