speed up

speed up idiom
Accelerate, expedite, increase the rate, as in The car speeded up as it went downhill, or It's difficult to speed up production without new equipment. [Late 1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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