See more synonyms for unstop on Thesaurus.com
verb (used with object), un·stopped, un·stop·ping.
  1. to remove the stopper from: to unstop a bottle.
  2. to free from any obstruction; open: to unstop a sewer.
  3. to draw out the stops of (an organ).

Origin of unstop

First recorded in 1350–1400, unstop is from the Middle English word unstoppen. See un-2, stop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of unstop

British Dictionary definitions for unstop


verb -stops, -stopping or -stopped (tr)
  1. to remove the stop or stopper from
  2. to free from any stoppage or obstruction; open
  3. to draw out the stops on (an organ)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012