To make neutral.

使中立。

To render inactive; make of no effect; counteract.

中和；使失效力；抵消。

To declare by treaty to be free from taking sides, as a small nation.

(小国)宣告中立。

To destroy the characteristics of a substance by chemical combination.

【化】中和。

To make inert by equalizing the positive and negative quantities.

【电】使不带电荷。