take effect
idiomatic phrase
1
                    
                                          
              
          
                                                      : to become operative                                      
              
                             
The new regulations will take effect next year.
                         
                
                    2
                    
                                          
              
          
                                                      : to begin producing an expected or intended effect or result                                      
              
                             
waiting for the drug to take effect
                         
                
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  Merriam-Webster unabridged




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