To concentrate is to focus your attention or effort on one thing and avoid distractions. In science, it can also mean to increase the strength of a substance by removing extra liquid or other parts.
From Latin 'concentrare', from 'com-' ('together') and 'centrum' ('center'), meaning 'to bring to a center'. It entered English via French in the 1600s.
To concentrate is literally to 'bring things to the center'—your thoughts, your effort, or the particles in a solution. Studying well often isn’t about working longer; it’s about pulling your scattered attention into a tight center for a short time.
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