neutralize

Meanings

• make politically neutral and thus inoffensive
  • "The treaty neutralized the small republic"
• make ineffective by counterbalancing the effect of
  • "Her optimism neutralizes his gloom"
• oppose and mitigate the effects of by contrary actions
• get rid of (someone who may be a threat) by killing
  • "the double agent was neutralized"
• make incapable of military action
• make chemically neutral
  • "She neutralized the solution"

Synonyms

counteract, counterbalance, countervail, do in, knock off, liquidate, negate, neutralise, nullify, waste