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neu·tral·ize / ˈn(y)oōtrəˌlīz/ • v. [tr.] render (something) ineffective or harmless by applying an opposite force or effect: impatience at his frailty began to neutralize her fear. ∎  make (an acidic or alkaline substance) chemically neutral. ∎  disarm (a bomb or similar weapon). ∎  a euphemistic way of saying kill or destroy, esp. in a covert or military operation.DERIVATIVES: neu·tral·i·za·tion / ˌn(y)oōtrəliˈzāshən/ n.neu·tral·iz·er n.