nullify

To nullify something means to make it invalid or ineffective. A peace treaty is an attempt to nullify aggression and division within a region.

If you take a null, or a zero, and make it into an action you can take, and you’ve got nullify — the act of making something void or zero-like. If you have an argument with your friend, it might nullify the fun you had together that day. This word is particularly used in legal language — a divorce nullifies a marriage — or in business disputes where you are trying to nullify someone else’s actions or plans.

Definitions of nullify
1

v declare invalid

Synonyms:
annul, avoid, invalidate, quash, void
Antonyms:
formalise, formalize, validate
declare or make legally valid
Types:
break
invalidate by judicial action
stet
printing: cancel, as of a correction or deletion
Type of:
cancel, strike down
declare null and void; make ineffective

v show to be invalid

Synonyms:
invalidate
Antonyms:
validate
prove valid; show or confirm the validity of something
Type of:
contradict, negate
prove negative; show to be false

v make ineffective by counterbalancing the effect of

Synonyms:
negate, neutralise, neutralize
Type of:
weaken
lessen the strength of

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