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verb (used with object), un·tied, un·ty·ing.
  1. to loose or unfasten (anything tied); let or set loose by undoing a knot.
  2. to undo the string or cords of.
  3. to undo, as a cord or a knot; unknot.
  4. to free from restraint.
  5. to resolve, as perplexities.
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verb (used without object), un·tied, un·ty·ing.
  1. to become untied.
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Origin of untie

before 1000; Middle English untyen, Old English untīegan. See un-2, tie
Can be confusedunite untie
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for untie


verb -ties, -tying or -tied
  1. to unfasten or free (a knot or something that is tied) or (of a knot or something that is tied) to become unfastened
  2. (tr) to free from constraint or restriction
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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

Word Origin and History for untie


Old English untiegan, from un- (2) + tie (v.). Related: Untied; untying.

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Online Etymology Dictionary, © 2010 Douglas Harper