quiet, calm, silent, still, noiseless, peaceful, serene

名詞 calm:

1. steadiness of mind under stress
   同義詞：composure, calmness, equanimity

動詞 calm:

1. make calm or still
   同義詞：calm down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, still
2. make steady
   同義詞：steady, becalm
3. become quiet or calm, especially after a state of agitation
   同義詞：calm down, cool off, chill out, simmer down, settle down, cool it
4. cause to be calm or quiet as by administering a sedative to
   同義詞：sedate, tranquilize, tranquillize, tranquillise

形容詞 calm:

1. not agitated; without losing self-possession
   同義詞：unagitated, serene, tranquil
2. (of weather) free from storm or wind
3. living without undue worry; taking life easy
   同義詞：easygoing, placid

1. She attempts to calm them down only made matters worse.
   她設(shè)法使他們平靜下來，不想?yún)s適得其反。
2. The calm sea gave no hint of the storm that was coming.
   平靜的海上沒有一點跡象顯示暴風雨即將來臨。
3. You should keep calm even in face of danger.
   即使面臨危險，你也應(yīng)當保持鎮(zhèn)靜。
4. It was a beautiful morning, calm and serene.
   那是一個寧靜、明媚的早晨。

calm

adj.（形容詞）
calm.er,calm.est
Nearly or completely motionless; undisturbed:
平穩(wěn)的，無波的：幾乎或完全不動的；未受干擾的：
例句：
the calm surface of the lake.
平靜的湖面

Not excited or agitated; composed:
鎮(zhèn)靜的，沉著的：未激動或未激怒的；安定的：
例句：
The President was calm throughout the global crisis.
在這全球危機整個過程中，總統(tǒng)一直保持平靜

n.（名詞）
An absence or cessation of motion; stillness.
靜止：運動的消失或停止；靜止
Serenity; tranquillity; peace.
寧靜；平靜；安寧
A condition of no wind or a wind with a speed of less than mile (2 kilometers) per hour, according to the Beaufort scale.
無風狀態(tài)：無風或按蒲氏劃分標準風速低于每小時英里（2公里）的狀態(tài)
v.tr.intr.（及物動詞和不及物動詞）
calmed,calm.ing,calms
To make or become calm or quiet:
使平穩(wěn)，使安靜：使或變?yōu)槠椒€(wěn)或安靜：
例句：
A warm bath will calm you. After the storm, the air calmed.
洗個熱水澡，會使你平靜下來的。暴風雨之后，空氣變得安靜了

來源：
Middle English calme
中古英語 calme
from Old French
源自 古法語
from Old Italian calmo
源自 古意大利語 calmo
from Late Latin cauma [heat of the day, resting place in the heat of the day]
源自 后期拉丁語 cauma [白天的熱量，在尚有白日余溫的休息地方]
from Greek kauma [burning heat]
源自 希臘語 kauma [燃燒熱]
from kaiein [to burn]
源自 kaiein [燃燒]
N., from Middle English calme
名詞，源自 中古英語 calme
from Italian calma
源自 意大利語 calma
from Vulgar Latin *calma
源自 俗拉丁語 *calma
from Late Latin
源自 后期拉丁語

【引伸】
calm.ly
adv.（副詞）
calm.ness
n.（名詞）
<參考詞匯><同義詞>calm,tranquil,placid,serene,halcyon,peacefulThese adjectives denote absence of excitement or disturbance.
這些形容詞表明沒有激動興奮或未被打擾。
Calm implies freedom from emotional agitation:
Calm 隱含遠離情感沖動之意：
例句：
calm acceptance of the inevitable.
平靜地接受這不可避免的事實。

Tranquil suggests a more enduring calm:
Tranquil 意味著一種更需忍耐的平靜：
例句：
hoped for a more tranquil life in the country.
希求置身鄉(xiāng)村的那種更為平靜的生活。

Placid suggests a pleasant, often phlegmatic calm:
Placid 意味著一種愉快的、常是遲鈍的平靜：
例句：
.Not everyone shared his placid temperament.Several cursed the delays. (Samuel G. Freedman).
.并非每個人都象他那樣遲鈍地忍耐。好幾個人詛咒這次的延誤. （塞繆爾G·弗里德曼）。

Serene denotes a lofty, even spiritual repose:
Serene 表明一種高超的、甚至是高尚的鎮(zhèn)靜：
例句：
remained serene in the midst of turbulence.
在這沸沸揚揚中保持鎮(zhèn)靜。

Halcyon suggests happy tranquillity:
Halcyon 意味著一種愉快的寧靜：
例句：
halcyon days of youth.
那愉快而寧靜的年輕歲月。

Peaceful implies undisturbed serenity:
Peaceful 意指未被打破的鎮(zhèn)靜：
例句：
.I am . . . peaceful as old age tonight. (Robert Browning).
.今晚，我如步入老年那樣平靜. （羅伯特·勃朗寧）