Neutralize (verb)

1. To make something neutral, inactive or ineffective.
2. To counteract or balance out the effects of something.

Origin:

From middle english neutralis, from latin neutralis ("neutral").

Examples:

1. The government neutralized the terrorist threat by capturing the leader of the group.
2. The chemical neutralized the acid.
3. The company neutralized the competition by buying them out.
4. The country's decision to neutralize its nuclear weapons was met with widespread support.
5. He neutralized his opponents by making strategic alliances with them.