nullify

To make null; invalidate.

To counteract the force or effectiveness of.

To annul; make void; render invalid; deprive of force or efficacy.

Synonyms Annul, Annihilate, etc. See neutralize.

To make void; to render invalid; to deprive of legal force or efficacy.

to make legally invalid.

to prevent from happening

show to be invalid

declare invalid

make ineffective by counterbalancing the effect of