Opposed, neutralized, or worked against something to diminish or prevent its effect; past tense of counteract.
From 'counter-' (against, opposite) plus 'act' (from Latin 'agere', to do). The word combines to mean acting against something, with the '-ed' making it past tense.
Every chemical reaction involves forces being counteracted—gravity pulls down while lift pushes up, heat expands while cooling contracts—it's the fundamental pattern of nature itself!
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