消沉的英文：
droop
sink
slump

参考例句：

You look downhearted
你好象很消沉。

All year she has fluctuated between optimism and despair.
全年当中她时而乐观，时而消沉。

The ardour was damped
热情消沉了。

I slid into a depression.
我逐渐消沉了。

In poor spirits; depressed
精神不好;意志消沉

I have not become downhearted or low-spirited
我并没有灰心或消沉。

Morale is high [low, falling].
士气高[消沉,低落]。

Downhearted thoughts hinder progress.
消沉的思想妨碍进步。

Her despondency about having no job
她因失业而意志消沉.

She is showing signs of withdrawal and depression.
她表现出孤僻与消沉的现象.

droop是什么意思：
v. （使）低垂，弯曲；枯萎；（使）颓丧
n. 下垂；消沉

To cause to droop or lose freshness.
使软垂，使枯萎，使调谢。

The flowers drooped in the hot sun.
花儿晒蔫了。

The pennant floats or droops in breeze or calm.
三角旗有风时飘扬，无风时下垂。

sink是什么意思：
v. （使）下沉；渐渐进入；淹没；消沉；渗透；挖掘
n. 洗涤槽

sink into a decline
开始衰落，衰弱下去，体力衰退

Sink or fall to a lower level.
下沉或下降到更低的水平。

swallow hold (sink, sinkhold)
落水洞

slump是什么意思：
v. 下跌；衰落；下降；（使）倒下
n. 骤降，猛跌，锐减；萧条期；衰退

She slumped into a chair.
她轰然倒在了椅子上。

Gill was dwelling on the consequences of the slump.
吉尔一直在考虑这衰退的后果。

Net profits slumped by 41%.
净利润暴跌了41%。