To fill something with energy or power again, especially after it has been used up or depleted.
From the prefix 're-' (again) plus 'charge,' which comes from Old French 'charger' meaning to load or fill. The 're-' prefix is one of the most productive in English, attaching to hundreds of verbs.
We use 'recharge' for everything from phone batteries to our own bodies—the metaphor is so perfect that tech companies borrowed the word directly from what people already said about rest!
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