To move or happen faster, or to cause something to speed up.
From Latin *accelerare* “to hasten, quicken,” from *ad-* “to” and *celer* “swift, fast.” It entered English through Latin-based scientific vocabulary.
When you press the gas pedal, you accelerate the car—but we also accelerate learning, change, or growth. The word shows how we borrow physics language to describe social and mental speed too.
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