neutralize

verb

To counterbalance; to render ineffective or void; to destroy by an opposite force or effect.

Pronunciation: /ˈnjuːtɹəlaɪz/ / /ˈnutɹəˌlaɪz/

Etymology: From French neutraliser (first attested in 1642). By surface analysis, neutral + -ize.

To make (something) even, inactive or ineffective.
“The antidote neutralized the toxin.”
“It’s possible that some microbes don’t just take up residence in tumors but help them grow. They may cloak the tumor from the immune system, neutralize drugs or help tumors spread through the body.”
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.”
To make (an acidic or alkaline substance) chemically neutral.
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.”
““We managed to neutralise the guilty person. So there was no longer any imminent threat,” De Croo said, […]”