[ uhn-bahr ]
/ ʌnˈbɑr /

verb (used with object), un·barred, un·bar·ring.

to remove a bar or bars from; open; unlock; unbolt: to unbar a door.

Origin of unbar

First recorded in 1300–50, unbar is from the Middle English word unbarren. See un-2, bar1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unbar

British Dictionary definitions for unbar

/ (ʌnˈbɑː) /

verb -bars, -barring or -barred (tr)

to take away a bar or bars from
to unfasten bars, locks, etc, from (a door); open
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