waterproofing
noun
                                                                                                                            
                                                            wa·ter·proof·ing
                    
                                                                                                              
                                                                                                                                  ˈwȯ-tər-ˌprü-fiŋ  
                                                                                                                              
            ˈwä-
                                                      
                                                          1
                    
        a
    
          
                                          
              
          
                                                      : the act or process of making something waterproof                                      
                
                    
        b
    
          
                                          
              
          
                                                      : the condition of being made waterproof                                      
                
                    
2
                    
                                          
              
          
                                                      : something (such as a coating) capable of imparting waterproofness                                      
                
                    
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  Merriam-Webster unabridged




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