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 things in the air or on the ground

“a swarm of insects obscured the light”

“clouds of blossoms”

“it discharged a cloud of spores”

make overcast or cloudy

“Fall weather often overcasts our beaches”

make less visible or unclear

“The stars are obscured by the clouds”

“the big elm tree obscures our view of the valley”

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's reputation”

make less clear

“the stroke clouded memories of her youth”