scotch1
  
  v.
   - decisively put an end to.
 - archaic injure and render harmless.
 - wedge or prevent from moving with a wedge.
 
n.
 archaic a wedge placed under a rolling object to prevent it slipping.
 
  Etymology
  C17 (as n.): of unknown origin; perh. rel. to skate1.
 
  
    
scotch2
  
  v.
 cut or score the skin or surface of.
n.
 a cut or score in skin or another surface.
 
  Etymology
  ME: of unknown origin.