unclog

[uhn-klog, -klawg]
verb (used with object), un·clogged, un·clog·ging.
  1. to free of an obstruction or impediment: to unclog a drain; to unclog rush-hour traffic.
verb (used without object), un·clogged, un·clog·ging.
  1. to become unclogged: I can't wash the dishes until the drain unclogs.

Origin of unclog

First recorded in 1600–10; un-2 + clog
Related formsun·clog·ger, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unclogger

unclog

verb -clogs, -clogging or -clogged
  1. (tr) to remove an obstruction from (a drain, etc)
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