decolorize
verb
                                                                                                                            
                                                            de·col·or·ize
                    
                                                                                                              
                                                                                                                                  (ˌ)dē-ˈkə-lə-ˌrīz  
                                                      
                                                          
            
            
              decolorized; decolorizing            
        
    
                                
              
          
                                                      : to remove color from                                      
              
                             
decolorize vinegar by adsorption of impurities on activated charcoal
                         
                
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  Merriam-Webster unabridged




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