cloud

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

(noun) a visible mass of water or ice particles suspended at a considerable altitude.

(noun) out of touch with reality. Example: "His head was in the clouds."

(noun) a cause of worry or gloom or trouble. Example: "The only cloud on the horizon was the possibility of dissent by the french."

(noun) suspicion affecting your reputation. Example: "After that mistake he was under a cloud."

(noun) a group of many things in the air or on the ground. Synonyms: swarm. Examples: "A swarm of insects obscured the light." "Clouds of blossoms." "It discharged a cloud of spores."

(verb) make overcast or cloudy. Synonyms: overcast. Example: "Fall weather often overcasts our beaches."

(verb) make less visible or unclear. Synonyms: obscure, befog, becloud, obnubilate, haze over, fog, mist. Examples: "The stars are obscured by the clouds." "The big elm tree obscures our view of the valley."

(verb) billow up in the form of a cloud. Example: "The smoke clouded above the houses."

(verb) make gloomy or depressed. Example: "Their faces were clouded with sadness."

(verb) place under suspicion or cast doubt upon. Synonyms: defile, sully, corrupt, taint. Example: "Sully someone's reputation."

(verb) make less clear. Example: "The stroke clouded memories of her youth."

(verb) colour with streaks or blotches of different shades. Synonyms: mottle, dapple.

(verb) make milky or dull. Example: "The chemical clouded the liquid to which it was added."