i Register
In some senses, quash is marked as obsolete. Watch for register when choosing this word.
verb
To defeat decisively, to suppress.
The army quashed the rebellion.
Contrition is apt to quash or allay all worldly grief.
To crush or dash to pieces.
The whales / Against sharp rocks, like reeling vessels, quashed, / Though huge as mountains, are in pieces dashed.
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.