boil1
  
  v.
    - (with reference to a liquid) reach or cause to reach the temperature at which it bubbles and turns to vapour.
 - (with reference to food) cook or be cooked by immersion in boiling water.
 - (of the sea or clouds) be turbulent and stormy. 
▸(of a person or emotion) be stirred up or inflamed.
 ▸
(boil over)
 become so excited or tense as to lose control.
 - 
(boil down to)
 amount to.
 
n.
  - the act or process of boiling. 
▸boiling point.
 - Fishing  a sudden rise of a fish at a fly.
 
 
  Phrase
  
    
      - keep the pot boiling
 maintain the brisk momentum or interest value of something. 
    
   
  Etymology
  ME: from OFr. boillir, from L. bullire ‘to bubble’, from bulla ‘bubble’.
 
  
    
boil2
  
  n.
 an inflamed pus-filled swelling on the skin.
 
  Etymology
  OE bȳle, bȳl, of W. Gmc origin.