quash

verb3

1. •
   To defeat decisively, to suppress.

   • The army quashed the rebellion.
2. •
   To void or suppress (a subpoena, decision, etc.).

   • In the case of an appeal against conviction the Court shall, if they allow the appeal, quash the conviction. — 1968
3. •
   (no longer used) To crush or dash to pieces.

   • The whales / Against sharp rocks, like reeling vessels, quashed, / Though huge as mountains, are in pieces dashed. — 1645