counteraction

noun
UK /ˌkaʊntərˈækʃən/
US /ˌkaʊntərˈækʃən/

A counteraction is something you do to stop or undo something else.

The medicine's counteraction against the poison saved the dog's life.


OTHER MEANINGS

2. An action taken to oppose or defeat another action.

The army planned a counteraction to the enemy's attack.

3. The process of making the effect of something weaker or harmless.

The counteraction of the acid by the base produced salt and water.

4. A force or influence that works against another force.

The two counteractions balanced each other out perfectly.