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 The grip or purchase that an object has on a surface 
      “Consider the friction of the axles and the friction of the wheels on the rails.” 
  
An act or state of one surface rubbing or grinding against another 
      “The friction can cause a painful rash that typically resolves when the chafing stops.” 
  
An act or state of abrading or wearing down a surface by rubbing or grinding 
      “The inner skin soils easily, and it cannot be cleaned, except by wearing away, through friction, as one does when erasing pencil marks from paper with a rubber eraser.” 
  
Conflict or animosity caused by a clash of wills, temperaments, or opinions 
      “The Arcot House is different from most royal houses in the country as there is no friction between the government and this former ruling family.” 
  
A serious incompatibility between two or more opinions, principles, interests or objects 
State of being impervious, immune to, or blocking an external influence or harm 
Conflicts of interest or disputes 
The exertion of force by means of a lever 
Power derived from the utilization of physical or chemical resources 
Damage or deterioration sustained from continuous use 
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