及物动词

1. 使失去法律效力;废除;取消
To nullify a legal decision or procedure means to declare that it is not legally valid.

2. 使无效;使无用;抵消
To nullify something means to make it have no effect.

1. make ineffective by counterbalancing the effect of

e.g. Her optimism neutralizes his gloom
This action will negate the effect of my efforts

Synonym: neutralizeneutralisenegate

2. show to be invalid

Synonym: invalidate

3. declare invalid

e.g. The contract was annulled
void a plea

Synonym: invalidateannulquashvoidavoid