annul
/əˈnʌl/verb
1annulled, annulling
with obj.（一般作 be annulled）declare invalid (an official agreement, decision, or result)宣告（协议、决定或结果）无效：the elections were annulled by the general amid renewed protests.
在新一轮抗议声中将军宣告选举无效。
1.1
- declare (a marriage) to have had no legal existence宣告（婚姻）无效：
her first marriage was finally annulled by His Holiness.
她的第一次婚姻最终由罗马教皇宣告无效。
派生词
annulment
noun词源
late Middle English: from Old French anuller, from late Latin annullare, from ad- 'to' + nullum 'nothing'.