neutralize

Verb
  1. Make politically neutral and thus inoffensive (synset 202541562)
    "The treaty neutralized the small republic"
  2. Make ineffective by counterbalancing the effect of (synset 200471015)
    "Her optimism neutralizes his gloom"; "This action will negate the effect of my efforts"
  3. Oppose and mitigate the effects of by contrary actions (synset 202549571)
    "This will counteract the foolish actions of my colleagues"
  4. Get rid of (someone who may be a threat) by killing (synset 201329983)
    "The mafia liquidated the informer"; "the double agent was neutralized"
  5. Make incapable of military action (synset 201120349)
  6. Make chemically neutral (synset 200470835)
    "She neutralized the solution"

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