depression

despair, desperation, depression, disappointment

这些名词都有“绝望、沮丧”之意。
despair: 普通用词，指因灾难等因素而丧失希望和信心，陷入沮丧，绝望的境地。
desperation: 语气强烈，指因绝望而使人采取无所顾忌的疯狂行动。
depression: 侧重指因遭受重大失利或挫折而产生的低落情绪。
disappointment: 多指愿望或期望的落空。

名词 depression:

1. a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity
2. a long-term economic state characterized by unemployment and low prices and low levels of trade and investment
   同义词：slump, economic crisis
3. a sunken or depressed geological formation
   同义词：natural depression
4. sad feelings of gloom and inadequacy
5. a period during the 1930s when there was a worldwide economic depression and mass unemployment
   同义词：Great Depression
6. an air mass of lower pressure; often brings precipitation
   同义词：low, low pressure
7. a state of depression and anhedonia so severe as to require clinical intervention
   同义词：depressive disorder, clinical depression
8. a concavity in a surface produced by pressing
   同义词：impression, imprint
9. angular distance below the horizon (especially of a celestial object)
10. pushing down

1. The threat of an economic depression hangs over the world.
   经济衰退的威胁笼罩着世界。
2. Her feeling of depression was transient.
   她那抑郁的心情一会儿就过去了。
3. Many people were idle during the depression.
   在那萧条时期，很多人都无事可做。
4. During the depression, millions of the unemployed wandered around in the streets.
   经济萧条时期，有好几百万的失业者在街头游荡。
5. In time of depression, there were no enough jobs.
   萧条时期，没有足够的工作机会。
6. He suffers from acute depression.
   他患有严重的抑郁症。
7. A depression over the Atlantic usually brings bad weather in Britain.
   大西洋上空的低气压通常给英国带来恶劣的天气。

de.pres.sion

n.（名词）

The act of depressing.
萎靡不振：使精神不振的行为
The condition of being depressed.
沮丧：精神不振的情形
An area that is sunk below its surroundings; a hollow.
下陷处，坑：比周围低的区域；洞，坑
The condition of feeling sad or despondent.
忧愁，沮丧：感到伤心，失望的样子
Psychology A psychotic or neurotic condition characterized by an inability to concentrate, insomnia, and feelings of extreme sadness, dejection, and hopelessness.
【心理学】 忧郁症：一种精神或神经状态，其特征是不能集中精力，失眠，感到过度忧郁、沮丧和绝望

A reduction in activity or force.
衰弱：活力或体力的减弱
A reduction in physiological vigor or activity:
减缓，迟缓，微弱：生理活力或体力的降低：
例句：
a depression in respiration.
呼吸微弱

A lowering in amount, degree, or position.
降低，削弱：数量、程度或地位的降低
Economics A period of drastic decline in a national or international economy, characterized by decreasing business activity, falling prices, and unemployment.
【经济学】 萧条，不景气：国家（或国际）经济不景气的一段时期，其特征是商业活动减少、价格下降、失业
Meteorology A region of low barometric pressure.
【气象学】 低压带：气压低的地区
The angular distance below the horizontal plane through the point of observation.
俯角：从观察点看，在水平平面下的角距离
Astronomy The angular distance of a celestial body below the horizon.
【天文学】 俯角：天体在地平线下的角距离