Etymology
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rejuvenate (v.)

"restore the appearance, powers, or feelings of youth to," 1807, an irregular formation from re- "again" + Latin juvenis "young" (see young (adj.)) + -ate (2). Related: Rejuvenated; rejuvenating.

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rejuvenation (n.)

"act or state of being or appearing to grow young again," 1834, noun of action from rejuvenate.

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