quash
/kwɔʃ; kwɑʃ/ v[Tn]
1 reject (sth) (by legal procedure) as not valid; declare (sth) not to be enforceable by law （依法）撤销（某事物）; 宣布（某事物）无效
quash a verdict 宣布裁决无效
They had their sentence quashed by the appeal court judge. 上诉法院的法官撤销了对他们的判决.
2 put an end to (sth); suppress or crush 制止（某事物）; 镇压; 捣碎
The rebellion was quickly quashed.叛乱被迅速平息.