fog1
  
  n.
  - a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility. 
▸Photography  cloudiness obscuring the image on a developed negative or print.
 - a state or cause of perplexity or confusion.
 
v.
 (fogs, fogging, fogged)
   - cover or become covered with steam. 
▸Photography  make (a film, negative, or print) obscure or cloudy.
 - bewilder or puzzle.
 - treat with something, especially an insecticide, in the form of a spray.
 
 
  Etymology
  C16: perh. a back-form. from foggy.
 
  
    
fog2
  
  n.
 the grass which grows in a field after a crop of hay has been taken.
 
  Etymology
  ME: origin uncertain; perh. rel. to Norw. fogg.