limp1
  
  v.
 walk with difficulty because of an injured leg or foot. 
▸(of a damaged ship or aircraft) proceed with difficulty.
n.
 a limping gait.
 
  Etymology
  ME: rel. to obs. limphalt ‘lame’, and prob. of Gmc origin.
 
  
    
limp2
  
  adj.
  - not stiff or firm. 
▸(of a book cover) not stiffened with board.
 - without energy or vigour.
 
 
  Derivative
  
  Etymology
  C18: of unknown origin; perh. rel. to limp1.