1
cloud sth
常用比喻义，指使事物变得不清晰或难以理解。
The fog clouded the road.
雾气使道路变得模糊。
使模糊；蒙蔽
clouded — past of cloud
先理解核心含义，再看它在真实句子里的用法。
使模糊；蒙蔽
To make something unclear or less sharp (e.g., judgment or a memory).
The fog clouded the road.
雾气使道路变得模糊。
变得模糊或阴沉,或被遮挡
To become foggy or gloomy, or obscured from sight.
用云覆盖或隐藏
To overspread or hide with a cloud or clouds.
呼吸变成云雾；变成雾气
Of the breath, to become cloud; to turn into mist.
使模糊
To make obscure.
cloud
Base
原形
clouds
3rd person
第三人称单数
clouding
-ing
现在分词
clouded
Past
过去式
clouded
Past participle
过去分词
Smoke clouds the sky.
烟雾遮蔽天空。
The memory clouded his judgment.
那段记忆使他的判断变得模糊。
Sadness has clouded her thoughts.
悲伤已经笼罩了她的思绪。
规则动词，过去式和过去分词加-ed。
The steam from the hot shower clouded the mirror.
热水淋浴的蒸汽使镜子变得模糊。
The sky began to cloud over in the afternoon.
下午天空开始乌云密布。
Her judgment was clouded by anger.
愤怒影响了她的判断。
常用比喻义，指使事物变得不清晰或难以理解。
The fog clouded the road.
雾气使道路变得模糊。
多用于描述天气变化，也可指表情变阴郁。
The sky clouded over and it started to rain.
天空乌云密布，开始下雨了。
常指物体表面因水汽变得模糊不清。
His glasses clouded up in the steam.
他的眼镜在蒸汽中起雾了。
Not this
The sky clouded quickly.
Use this
The sky clouded over quickly.
动词 cloud 作不及物表示天气变多云时，通常需要副词 over 或 up 来补充，否则句子不完整。
Not this
His judgment was clouded with anger.
Use this
His judgment was clouded by anger.
cloud 表示‘被蒙蔽’时，常用介词 by 引出施动者，用 with 则显得不自然。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
布满云；变阴
The sky clouded over and it started to rain.
天空布满了云，开始下雨了。
使问题模糊；搅浑水
Try not to cloud the issue with unrelated facts.
尽量不要用无关的事实把问题弄得模糊不清。
影响判断；使判断力模糊
Anger clouded his judgment.
愤怒使他的判断力变得模糊。
把水搅浑；（喻）使情况复杂化
The new evidence only clouded the waters.
新证据只是把情况弄得更复杂了。
使记忆模糊
Time had clouded her memory of the event.
时间让她对那件事的记忆变得模糊。
遮蔽天空
Smoke from the fire clouded the sky.
火冒出的烟遮蔽了天空。
受怀疑；失宠
He left the company under a cloud after the scandal.
丑闻发生后，他是在受到怀疑的情况下离开公司的。
每一朵乌云都有一线银边；凡事都有好的一面
I lost my job, but every cloud has a silver lining: I finally have time to study.
我丢了工作，但每朵乌云都镶着银边：我终于有时间学习了。
蒙蔽某人的判断
Don't let anger cloud your judgment when making this decision.
做这个决定时，别让愤怒蒙蔽你的判断。
Use clouded naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
云（cloud）遮住太阳，视线变暗——动词记“使模糊；蒙蔽；使阴沉”，一块云就是一个动作。
语域：mixed 常见场景：weather and sky、breath or window、judgment or thinking、reputation or character 该动词的语体随义项变化：字面义（云层遮蔽、使起雾）多用于日常天气或视线描写；引申义（使模糊、蒙蔽、损害声誉）比较常见于书面或较正式的表达，如 cloud someone's judgment 或 cloud a reputation。整体来看正式与非正式场合都会出现，因此标为混合。
与 cloud (/klaʊd/) 同韵的词：loud /laʊd/、proud /praʊd/、crowd /kraʊd/、aloud /əˈlaʊd/，重读元音和后面的辅音都是 /aʊd/。拼写相似的 clout /klaʊt/ 和 could /kʊd/ 发音不同：clout 以 /t/ 结尾，could 的元音是 /ʊ/ 而非 /aʊ/。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.