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1.                 From English-Hindi FreeDict Dictionary ver. 1.6:
                   
   
   
                   
                     
   underline /ˌʌndəlˈaɪn/ <VT>
   1. नीचे~रेखा~खींच
         "The teacher told the students to underline the important words in the lesson."
   2. पर~बल~देना
         "The huge response to the rally underlines the public support."