1. 取消：quasar 恒星状球体 | quash 取消 | quashy 似沼泽的

2. 镇压,粉碎：put down镇压 | quash镇压,粉碎 | quell镇压,平息

3. 撤销,废除 撤销,废除：quarantine 检疫隔离 检疫隔离 | quash 撤销,废除 撤销,废除 | quasi 准,类似,似乎 准,类似,似乎

1. 撤销，废止（决定或判决）;宣布无效
    If a court or someone in authority quashes a decision or judgment, they officially reject it.

    e.g. The Appeal Court has quashed the convictions of all eleven people.
           上诉法庭已经撤销对所有11人的判决。

2. 平息，制止，澄清(谣言)
    If someone quashes rumours, they say or do something to demonstrate that the rumours are not true.

quash的近义词

    e.g. Graham attempted to quash rumours of growing discontent.
           格雷厄姆试图平息有关不满情绪日益强烈的流言。

3. 镇压;压制;平定
    To quash a rebellion or protest means to stop it, often in a violent way.

    e.g. Troops were displaying an obvious reluctance to get involved in quashing demonstrations.
           部队显然并不愿意参与镇压示威游行。

1. put down by force or intimidation

    e.g. The government quashes any attempt of an uprising
           China keeps down her dissidents very efficiently
           The rich landowners subjugated the peasants working the land

    Synonym: represskeep downsubduesubjugatereduce

2. declare invalid

    e.g. The contract was annulled
           void a plea

    Synonym: invalidateannulvoidavoidnullify