neutralize

verb4

1. •
   To make (something) even, inactive or ineffective.

   • The antidote neutralized the toxin.
2. •
   To make (an acidic or alkaline substance) chemically neutral.
3. •
   (euphemistic) To kill.

   • At the beginning of the opening game, Shepard becomes the first human Spectre, an elite operative given broad authority to neutralize threats to galactic order in the galaxy. — 2019
4. •
   To make (a territory, etc.) politically neutral.

   • All the powers involved are committed not only to stay out of a given territory, but also to reenter it if any one of them violates the independence of the neutralized country. — 1965