1.云
2.云状物（如尘雾、烟雾、一群飞行的昆虫）
3.阴影；忧郁；焦虑；令人忧虑的事
动词：
1.(使)某物变得阴沉暗淡，不清楚
不及物动词：
1.显得阴沉（或恐惧、愤怒等）；看起来忧愁（或害怕、愤怒等）
2.(天空) 布满云
及物动词：
1. 使减少乐趣；使不快
2. 使难以理解；使记不清楚；使模糊
3.（尤指用无关的话题来）混淆，搅浑（问题） 词形变化
- 形容词 cloudless
- 时态 clouded，clouding，clouds
- make less visible or unclear
- place under suspicion or cast doubt upon
- make gloomy or depressed
- billow up in the form of a cloud
- colour with streaks or blotches of different shades
- suspicion affecting your reputation
- a cause of worry or gloom or trouble
- make milky or dull
- a visible mass of water or ice particles suspended at a considerable altitude
- any collection of particles (e.g., smoke or dust) or gases that is visible
- out of touch with reality
- a group of many insects
- make overcast or cloudy