annul
1.VERB 动词废除，取消（合同等）；宣告（选举等）无效 If an election or a contract is annulled, it is declared invalid, so that legally it is considered never to have existed.
【语法信息】：be V-ed
【搭配模式】：usu passive
Opposition party leaders are now pressing for the entire election to be annulled...
反对党领导人现正强烈要求宣告这次选举无效。
The marriage was annulled last month.
上个月这桩婚姻被宣告无效。
