calm

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

名词 calm:

1. steadiness of mind under stress
   同义词：composure, calmness, equanimity

动词 calm:

1. make calm or still
   同义词：calm down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, still
2. make steady
   同义词：steady, becalm
3. become quiet or calm, especially after a state of agitation
   同义词：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
   同义词：sedate, tranquilize, tranquillize, tranquillise

形容词 calm:

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

1. She attempts to calm them down only made matters worse.
   她设法使他们平静下来，不想却适得其反。
2. The calm sea gave no hint of the storm that was coming.
   平静的海上没有一点迹象显示暴风雨即将来临。
3. You should keep calm even in face of danger.
   即使面临危险，你也应当保持镇静。
4. It was a beautiful morning, calm and serene.
   那是一个宁静、明媚的早晨。

calm

adj.（形容词）
calm.er,calm.est
Nearly or completely motionless; undisturbed:
平稳的，无波的：几乎或完全不动的；未受干扰的：
例句：
the calm surface of the lake.
平静的湖面

Not excited or agitated; composed:
镇静的，沉着的：未激动或未激怒的；安定的：
例句：
The President was calm throughout the global crisis.
在这全球危机整个过程中，总统一直保持平静

n.（名词）
An absence or cessation of motion; stillness.
静止：运动的消失或停止；静止
Serenity; tranquillity; peace.
宁静；平静；安宁
A condition of no wind or a wind with a speed of less than mile (2 kilometers) per hour, according to the Beaufort scale.
无风状态：无风或按蒲氏划分标准风速低于每小时英里（2公里）的状态
v.tr.intr.（及物动词和不及物动词）
calmed,calm.ing,calms
To make or become calm or quiet:
使平稳，使安静：使或变为平稳或安静：
例句：
A warm bath will calm you. After the storm, the air calmed.
洗个热水澡，会使你平静下来的。暴风雨之后，空气变得安静了

来源：
Middle English calme
中古英语 calme
from Old French
源自 古法语
from Old Italian calmo
源自 古意大利语 calmo
from Late Latin cauma [heat of the day, resting place in the heat of the day]
源自 后期拉丁语 cauma [白天的热量，在尚有白日余温的休息地方]
from Greek kauma [burning heat]
源自 希腊语 kauma [燃烧热]
from kaiein [to burn]
源自 kaiein [燃烧]
N., from Middle English calme
名词，源自 中古英语 calme
from Italian calma
源自 意大利语 calma
from Vulgar Latin *calma
源自 俗拉丁语 *calma
from Late Latin
源自 后期拉丁语

【引伸】
calm.ly
adv.（副词）
calm.ness
n.（名词）
<参考词汇><同义词>calm,tranquil,placid,serene,halcyon,peacefulThese adjectives denote absence of excitement or disturbance.
这些形容词表明没有激动兴奋或未被打扰。
Calm implies freedom from emotional agitation:
Calm 隐含远离情感冲动之意：
例句：
calm acceptance of the inevitable.
平静地接受这不可避免的事实。

Tranquil suggests a more enduring calm:
Tranquil 意味着一种更需忍耐的平静：
例句：
hoped for a more tranquil life in the country.
希求置身乡村的那种更为平静的生活。

Placid suggests a pleasant, often phlegmatic calm:
Placid 意味着一种愉快的、常是迟钝的平静：
例句：
.Not everyone shared his placid temperament.Several cursed the delays. (Samuel G. Freedman).
.并非每个人都象他那样迟钝地忍耐。好几个人诅咒这次的延误. （塞缪尔G·弗里德曼）。

Serene denotes a lofty, even spiritual repose:
Serene 表明一种高超的、甚至是高尚的镇静：
例句：
remained serene in the midst of turbulence.
在这沸沸扬扬中保持镇静。

Halcyon suggests happy tranquillity:
Halcyon 意味着一种愉快的宁静：
例句：
halcyon days of youth.
那愉快而宁静的年轻岁月。

Peaceful implies undisturbed serenity:
Peaceful 意指未被打破的镇静：
例句：
.I am . . . peaceful as old age tonight. (Robert Browning).
.今晚，我如步入老年那样平静. （罗伯特·勃朗宁）