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Found one definition

1.                 From Khasi-English FreeDict Dictionary ver. 0.2.2:
                   
   
   
                   
                     
   syep <n>
   brow
         "Ym don kaei kaei ka ban kham thiang ban ïa kaba ngi ïoh da la ka um syep."  - Nothing is sweeter than what we earn by the sweat of our brow.