lunge1
  
  n.
 a sudden forward movement of the body. 
▸a thrust in fencing, in which the leading leg is bent while the back leg remains straightened.
v.
 (lunges, lungeing or lunging, lunged)
 make a lunge. 
▸make a sudden forward thrust with.
 
  Etymology
  C18: from earlier allonge, from Fr. allonger ‘lengthen’.
 
  
    
lunge2
  
  n.
 a long rein on which a horse is made to move in a circle round its trainer.
v.
 (lunges, lungeing, lunged)
 exercise (a horse or rider) on a lunge.
 
  Etymology
  C18: from Fr. longe, from allonge ‘lengthening out’.