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unbolt

[uhn-bohlt] /ʌnˈboʊlt/
verb (used with object)
1.
to open (a door, window, etc.) by or as if by removing a bolt; unlock; unfasten.
2.
to release, as by the removal of threaded bolts:
He unscrewed the nuts and unbolted the inspection cover.
verb (used without object)
3.
to become unbolted or unfastened.
Origin
late Middle English
1425-1475
1425-75; late Middle English; see un-2 + bolt1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un bolt

unbolt

/ʌnˈbəʊlt/
verb (transitive)
1.
to unfasten a bolt of (a door)
2.
to undo (the nut) on a bolt
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
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