v.使无效；废除；取消
The election results were nullified because of voter fraud. 因为选民舞弊，选举结果无效。
Counterintelligence seeks to nullify the enemy's espionage efforts. 反间谍情报之目的是挫败敌人的间谍活动。
He has no right to nullify laws. 他无权废除法律。
