To make something or someone feel young, fresh, or energetic again; to restore vitality.
From Latin 're-' (again) and 'juvenis' (young). The word entered English in the 1600s through scientific and medical writing about renewal and restoration.
Your body actually does rejuvenate itself—most of your cells completely replace themselves every 7-10 years, so you're literally a different person than you were a decade ago!
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