nullify
(verb)
verb
1. declare invalid
- The contract was annulled
Similar word(s): annul, avoid, invalidate, quash, void
Definition categories: social, cancel
2. show to be invalid
Similar word(s): invalidate
Definition categories: cognition, contradict, negate
3. make ineffective by counterbalancing the effect of
Similar word(s): negate, neutralise, neutralize