unbridle

[ uhn-brahyd-l ]
/ ʌnˈbraɪd l /

verb (used with object), un·bri·dled, un·bri·dling.

to remove the bridle from (a horse, mule, etc.).
to free from restraint.

Origin of unbridle

1350–1400; Middle English unbridlen. See un-2, bridle (v.)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for unbridle

unbridle
/ (ʌnˈbraɪdəl) /

verb (tr)

to remove the bridle from (a horse)
to remove all controls or restraints from
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