counteract

From Wiktionary

Word parts[change]

counter- + act

Pronunciation[change]

Verb[change]

Plain form
counteract

Third-person singular
counteracts

Past tense
counteracted

Past participle
counteracted

Present participle
counteracting

  1. If something counteracts the effects of something else, it acts against those effects.
    Alcohol will counteract the effects of learning.

Related words[change]