In a way that is speeded up or quickened; moving or happening at an increased pace.
From accelerated (past participle of accelerate) + -ly (forming adverbs). The base accelerate comes from Latin accelerare, combining ad- (to) and celer (swift).
English loves stacking suffixes—accelerate becomes accelerated becomes acceleratedly, creating a word that's technically correct but so awkward that most writers would prefer 'quickly' or 'rapidly' instead!
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