weatherize
verb
                                                                                                                            
                                                            weath·er·ize
                    
                                                                                                              
                                                                                                                                  ˈwe-t͟hə-ˌrīz  
                                                      
                                                          
            
            
              weatherized; weatherizing            
        
    
                                
              
          
                                                      : to make (something, such as a house) better protected against winter weather (as by adding insulation)                                      
                
                    
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  Merriam-Webster unabridged




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