1. 形容詞
   平靜的, 冷靜的
   鎮定的, 心靜的
   鎮靜的, 沉著的
   心平氣和的, 淡定的
   無風無浪的
   不動聲色的
   (人)calm about ...(事):
   對...很冷靜的
   對...很鎮定的
   對...心平氣和的
   

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   同義字詞
   halcyon,hushed,peaceful,placid,quiet,serene,still,stilly,tranquil,untroubled
   collected,composed,cool,coolheaded,equal,level,limpid,peaceful,placid,possessed,recollected,sedate,self-composed,self-possessed,serene,smooth,tranquil,undisturbed,unperturbed,unruffled,unshaken,untroubled,unworried
   arcadian,hushed,peaceful,placid,quiet,restful,serene,still,stilly,tranquil
   

2. 動詞
   及物動詞:
   使...(人等)平靜
   使...(人等)鎮定
   使...(人等)心靜
   使...(人等)冷靜
   使...(人等)鎮靜
   平息...(情勢、自然現象等)
   穩定...(情勢、自然現象等)
   (人等)calm down:
   平靜下來
   

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   同義字詞
   becalm,compose,lull,lullaby,quiet,salve,settle,soothe,still,tranquilize,tranquillize
   collect,compose,contain,control,re-collect,settle
   

3. 名詞
   可為可數與不可數名詞:
   安靜, 鎮定
   平靜, 平穩
   寧靜, 寧靜時期
   安詳, 安詳時期
   風平浪靜, 無風
   /此名詞複數為"calms"/
   可為不可數或單數可數名詞:
   calm before the storm/
   a calm before the storm:
   

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   同義字詞
   calmness,hush,peace,peacefulness,placidity,quiet,quietness,quietude,repose,restfulness,sereneness,serenity,still,stillness,tranquillity,tranquility
   calmness,heartsease,peace,peacefulness,placidity,sereneness,serenity,tranquillity,tranquility
   

4. 動詞片語連結
   (人)keep calm/
   (人)keep ...(主詞)'s calm:
   保持冷靜
   保持鎮定
   沉住氣
   沉得住氣
   (指抑制自己)忍住氣
   忍得住氣
   鎮定自若
   keep ...(人) calm:
   

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5. 成語
   after a storm comes a calm/
   after the storm comes the calm:
   雨過天青
   雨過天青，否極泰來
   否極泰來
   暴風雨後有寧靜
   

例句

1. Let's everybody calm down.
2. Calm down , he said to himself.
3. We were calm but so ready to go.
4. It helps your brain to calm down.
5. That seemed to calm him right down.
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