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1.                 From English-Hindi FreeDict Dictionary ver. 1.6:
                   
   
   
                   
                     
   rationalize /ɹˈaʃənəlˌaɪz/ <V>
   1. तर्क~संगत~ठहराना
         "He rationalized his decision to buy a bike by saying that it would save his"
         "money on bus fares. "