Open English Wordnet
Verbs
(v)neutralizemake politically neutral and thus inoffensive“The treaty neutralized the small republic”
(v)neutralize, neutralise, nullify, negatemake ineffective by counterbalancing the effect of“Her optimism neutralizes his gloom”, “This action will negate the effect of my efforts”
(v)counteract, countervail, neutralize, counterbalanceoppose and mitigate the effects of by contrary actions“This will counteract the foolish actions of my colleagues”
(v)neutralize, neutralise, liquidate, waste, knock off, do inget rid of (someone who may be a threat) by killing“The mafia liquidated the informer”, “the double agent was neutralized”