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uncoupling

 - 3 dictionary results

un⋅cou⋅ple

[uhn-kuhp-uhl] verb, -pled, -pling.
–verb (used with object)
1. to release the coupling or link between; disconnect; let go: to uncouple railroad cars.
–verb (used without object)
2. to become unfastened; let go: The glider uncoupled from the tow plane.

Origin:
1300–50; ME unco(u)plen; see un- 2 , couple
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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un·cou·ple   (ŭn-kŭp'əl)   
v.   un·cou·pled, un·cou·pling, un·cou·ples

v.   tr.
  1. To disconnect: uncouple railroad cars.

  2. To set loose or release from a couple.

v.   intr.
To come or break loose.
un·cou'pler n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

uncouple 
c.1300, from un- (2) + couple (v.). Cf. M.Du. ontcoppelen.
Online Etymology Dictionary, © 2001 Douglas Harper
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