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"

colour with streaks or blotches of different shades

make milky or dull; "The chemical clouded the liquid to which it was added"