C16: from Latin accelerātus, from accelerāre to go faster, from ad- (intensive) + celerāre to hasten, from celer swift
Word Origin and History for accelerate
v.
1520s, from Latin acceleratus, past participle of accelerare "to hasten, to quicken," from ad- "to" (see ad-) + celerare "hasten," from celer "swift" (see celerity). Related: Accelerated; accelerating.