cloud

any collection of particles (e.g., smoke or dust) or gases that is visible

a visible mass of water or ice particles suspended at a considerable altitude

out of touch with reality

• “his head was in the clouds”

a cause of worry or gloom or trouble

• “the only cloud on the horizon was the possibility of dissent by the French”

suspicion affecting your reputation

• “after that mistake he was under a cloud”

a group of many insects

• “a swarm of insects obscured the light”
• “a cloud of butterflies”

make overcast or cloudy

• “Fall weather often overcasts our beaches”

make less visible or unclear

• “The stars are obscured by the clouds”

billow up in the form of a cloud

• “The smoke clouded above the houses”

make gloomy or depressed

• “Their faces were clouded with sadness”

place under suspicion or cast doubt upon

• “sully someone”

colour with streaks or blotches of different shades

make milky or dull

• “The chemical clouded the liquid to which it was added”