fog

Noun

• confusion characterized by lack of clarity

• an atmosphere in which visibility is reduced because of a cloud of some substance

• droplets of water vapor suspended in the air near the ground

Verb

• make less visible or unclear
  • The stars are obscured by the clouds
    
  • the big elm tree obscures our view of the valley
    

Related words

• Synonyms: 
  daze , haze , fogginess , murk , murkiness , obscure , befog , becloud , obnubilate , haze over , cloud , mist