cloud

• n.
  • 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 cloud of butterflies"

    同义词： swarm

• v.
  • make overcast or cloudy

    同义词： overcast

  • make less visible or unclear

    "The stars are obscured by the clouds"

    同义词： obscure befog becloud obnubilate haze over fog mist

  • 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

    同义词： defile sully corrupt taint

  • colour with streaks or blotches of different shades

    同义词： mottle dapple

  • make milky or dull

    "The chemical clouded the liquid to which it was added"

以上来源于: WordNet