动词过去式:nullified 过去分词:nullified 现在分词:nullifying 第三人称单数:nullifies
v (pt, pp -fied) [Tn]
1 make (an agreement, etc) lose its legal force 使（协议等）失去法律约束力.
2 make (sth) ineffective; counteract 使（某事物）无效; 抵销
*How can we nullify the enemy's propaganda? 怎样才能抵销敌人的宣传?
v past tense and past participlenullifiedpresent participlenullifyingthird person singularnullifies [T]
law to officially state that something has no legal force
The election results were nullified because of voter fraud.
formal to make something lose its effect or value
Recent inflation could nullify the economic growth of the last several years.