quash


quash (http://definr.com/quash)

     v 1: put down by force or intimidation; "The government quashes
          any attempt of an uprising"; "China keeps down her
          dissidents very efficiently"; "The rich landowners
          subjugated the peasants working the land" [syn: repress,
           keep down, subdue, subjugate, reduce]
     2: declare invalid; "The contract was annulled"; "avoid a plea"
        [syn: invalidate, annul, void, avoid, nullify]
        [ant: validate]