WORLD HISTORY

Detailed explanation-1: -Annul, which means “to cancel” or “to invalidate, ‘’ is usually used in the context of politics or marriage. New government officials often want to annul laws and policies of the previous post-holder, effectively reversing their work.

Detailed explanation-2: -/əˈnʌl/-ll-to officially announce that something such as a law, agreement, or marriage no longer exists: His second marriage was annulled because he never divorced his first wife.

Detailed explanation-3: -to state officially that something such as a law, agreement, or marriage no longer exists: The court did not annul the sentences but ruled they should be reviewed.

Detailed explanation-4: -To “annul” is used in the sense of cancelling a contract, like a marriage. To “nullify” means to reduce the effect of something, e.g. “drinking alcohol nullifies the effect of depression”.