Meaning : Act in opposition to.
Synonyms : antagonise, antagonize
Meaning : Oppose or check by a counteraction.
Synonyms : countercheck
Meaning : Oppose and mitigate the effects of by contrary actions.
Example :
This will counteract the foolish actions of my colleagues.
Synonyms : counterbalance, countervail, neutralize
Meaning : Destroy property or hinder normal operations.
Example :
The Resistance sabotaged railroad operations during the war.
Synonyms : countermine, sabotage, subvert, undermine, weaken