VERB
使失去法律效力;廢除;取消
To nullify a legal decision or procedure means to declare that it is not legally valid.
例句
He used his broad executive powers to nullify decisions by local governments...
他利用自己適用范圍廣泛的行政權力廢止當地政府所作的決定。
It is worth remembering that previous wills are nullified automatically upon marriage.
要記住的是，一旦結婚，原遺囑自動失效。