Dictionary and Thesaurus

Definition of Counteract

• (v. t.) To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

Synonyms of Counteract

• Antagonize
• Antagonise
• Countercheck
• Countervail
• Neutralize
• Counterbalance
• Sabotage
• Undermine
• Countermine
• Subvert
• Weaken

Antonyms of Counteract

Homophones of Counteract