cool

cold, cool, chilly, frosty, freezing, icy

这些形容词均含“冷、凉”之意。
cold: 最普通用词，强调缺乏温暖，使人不舒服。
cool: 指既不太热也不太冷。
chilly: 指使哆嗦的冷。
frosty: 指雾气在寒冷物体的表面凝结成薄冰时的严寒结霜的温度。
freezing: 指使人僵直，使东西凝固的冷。
icy: 多指风暴、风雪和水等冷得使人感到如刺如割。

名词 cool:

1. the quality of being at a refreshingly low temperature
2. great coolness and composure under strain
   同义词：aplomb, assuredness, poise, sang-froid

动词 cool:

1. make cool or cooler
   同义词：chill, cool down
2. loose heat
   同义词：chill, cool down
3. lose intensity
   同义词：cool off, cool down

形容词 cool:

1. neither warm nor very cold; giving relief from heat
2. marked by calm self-control (especially in trying circumstances); unemotional
   同义词：coolheaded, nerveless
3. (color) inducing the impression of coolness; used especially of greens and blues and violets
4. psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike
5. (used of a number or sum) without exaggeration or qualification
6. fashionable and attractive at the time; often skilled or socially adept

1. A day in jail cooled him off.
   一天的铁窗生活使他冷静了下来。
2. As it was a hot day she wore a cool dress.
   因为天气热，她穿了一件凉快的衣服。
3. Even when you argue, you should try to keep cool.
   即使在争辩时，你也要尽力保持冷静。

cool

adj.（形容词）
cool.er,cool.est
Neither warm nor very cold; moderately cold:
凉的：既不温暖也不很冷的；适度凉的：
例句：
fresh, cool water; a cool autumn evening.
清凉的水；清新的秋夜

Giving or suggesting relief from heat:
凉快的：令人凉快的或有爽快感的：
例句：
a cool breeze; a cool blouse.
凉爽的微风；凉爽的女衬衣

Marked by calm self-control:
冷静的：以冷静的自控为特征的：
例句：
a cool negotiator.
冷静的谈判者

Marked by indifference, disdain, or dislike; unfriendly or unresponsive:
冷淡的：态度冷漠、轻视或不喜欢的；不友好的或反应冷淡的：
例句：
a cool greeting; was cool to the idea of higher taxes.
冷淡的问候；对提高税收的意见反应冷淡

Of, relating to, or characteristic of colors, such as blue and green, that produce the impression of coolness.
冷色调的：产生凉感的颜色的，如蓝色或绿色等，或具有冷色特征的
Slang Excellent; first-rate:
【俚语】 顶好的：优秀的；一流的：
例句：
has a cool sports car; had a cool time at the party.
拥有一流的跑车；在晚会上玩得好极了

Slang Entire; full:
【俚语】 整整的；满的：
例句：
worth a cool million.
整整要一百万

v.（动词）
cooled,cool.ing,cools
v.tr.（及物动词）
To make less warm.
使…变凉
To make less ardent, intense, or zealous:
使减轻（少）热情、紧张或热心：
例句：
problems that soon cooled my enthusiasm for the project.
这些问题使我对这个计划失去了热情

v.intr.（不及物动词）
To become less warm:
冷却：
例句：
took a dip to cool off.
泡在水中冷却一下

To become calmer:
变得冷静下来：
例句：
needed time for tempers to cool.
需要时间冷静下来

n.（名词）
A cool place, part, or time:
凉爽：凉快的地方、部分或时候：
例句：
the cool of early morning.
清早的凉爽时刻

The state or quality of being cool.
凉快：凉（快）的状态或性质
Slang Composure; poise:
【俚语】 镇静：镇静；沉着：
例句：
.Our release marked a victory. The nation had kept its cool.(Moorhead Kennedy)
.我们的释放标志着胜利的到来。国家已稳定了下来.(穆尔黑德·肯尼迪)

<习惯用语>cool it【俚语】
To calm down; relax.
冷静下来；轻松
cool (one`s) heels【非正式用语】
To wait or be kept waiting.
等着或别人让等着
来源：
Middle English cole
中古英语 cole
from Old English côl * see gel-
源自 古英语 côl *参见 gel-

【引伸】
cool.ish
adj.（形容词）
cool.ly
adv.（副词）
cool.ness
n.（名词）
<参考词汇><同义词>cool,composed,collected,unruffled,nonchalant,imperturbable,detachedThese adjectives apply to persons, their attitudes, their behavior, or their actions to indicate absence of excitement or discomposure,especially in times of stress.
这些形容词适用于人或人们的态度、举止或行为，表示冷静沉着或不慌不忙，尤其是在紧张时刻。
Cool usually implies merely a high degree of self-control,though it may also indicate aloofness:
Cool 通常只指一种高度的自我控制，虽然它也可以表示冷漠超然：
例句：
.Keep strong, if possible.In any case, keep cool.Have unlimited patience. (B.H. Liddell Hart).
.如果可能，保持强壮。任何情况，保持冷静。要有无限的耐心. （B·H·里德尔·哈特）。

例句：
.An honest hater is often a better fellow than a cool friend. (John Stuart Blackie).
.一个恨你但是诚实的人常常比一个漠不关心的朋友更好. （约翰·斯图亚特·布莱基）。

Composed implies a serene, often sedate quality arising from self-discipline:
Composed 带有产生于自我约束的一种安详宁静的，常常是镇定沉着的品质之意：
例句：
The performer was composed as she readied herself for her entrance on stage.
这位演员在准备上场时沉着冷静。

Collected suggests self-possessed composure:
Collected 含有泰然自若、沉着镇静之意：
例句：
The witness remained collected throughout the cross-examination.
证人在整个反诘问过程中保持着镇静自若。

Unruffled emphasizes calm despite circumstances that might elicit agitation:
Unruffled 强调环境可能会引起激动不安时仍保持冷静：
例句：
.with contented mind and unruffled spirit. (Anthony Trollope).
.心满意足且心情平静. （安东尼·特洛普）。

Nonchalant describes a casual manner that may suggest, sometimes misleadingly, a lack of interest or concern:
Nonchalant 指一种可能（有时是误导性地）带有缺乏兴趣或关心意味的不拘礼节的态度：
例句：
He doesn`t seem excited;
他看上去并不兴奋；

例句：
on the contrary, his demeanor is easy and nonchalant.
相反，他的举止轻松而无动于衷。

Imperturbable stresses unshakable calmness considered usually as an inherent trait rather than as a product of self-discipline:
Imperturbable 侧重于一种不可动摇的沉着冷静，通常被认为是天生的特性而不是自我约束的产物：
例句：
.A man . . ./Cool, and quite English, imperturbable. (Byron).
.一个…非常英国式的人，冷漠而不易激动. （拜伦）。

Detached implies aloofness resulting either from lack of active concern or from resistance to emotional involvement:
Detached 含有冷漠超然的意思，可以是因为不太关心也可以是因为不愿介入感情纠葛：
例句：
She may be detached,she may even be unfeeling,but at least she`s not hypocritically effusive. See also Synonyms at cold
她可能冷漠，她甚至可能冷酷无情，但至少她不会假惺惺地过分热情 参见同义词 cold