counteract

英[kaʊntər'ækt] 美[,kaʊntɚ'ækt]

1. act in opposition to

2. oppose or check by a counteraction

3. oppose and mitigate the effects of by contrary actions;

"This will counteract the foolish actions of my colleagues"

4. destroy property or hinder normal operations;

"The Resistance sabotaged railroad operations during the war"