chisel
chis·el
I
 /ˈʧızl̩/  noun  ,  pl   -els [  count  ]
  : a metal tool with a flat, sharp end that is used to cut and shape a solid material (such as stone, wood, or metal)
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II
  verb  , -els,  US   -eled  or Brit   -elled,  US   -el·ing  or Brit   -el·ling [  + obj  ]
  : to cut or shape (something) with a chisel
   She chiseled the stone/wood/marble.
   He chiseled off a corner of the block.
   Letters were chiseled into a wall.