counteract
verb (used with object)
to act in opposition to; frustrate by contrary action.
had been counteracting
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past perfect progressiveof counteract.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Removing sulphate pollution takes away some of the cooling that had been counteracting greenhouse warming.
From BBC ● Sep. 8, 2026
