[ uhn-hawrs ]
/ ʌnˈhɔrs /

verb (used with object), un·horsed, un·hors·ing.

to cause to fall from a horse, as in battle; dislodge from the saddle: Sir Gawain unhorsed the strange knight.
to defeat; overcome; dislodge, as from a position or office: His vigorous campaign unhorsed his adversary.

Origin of unhorse

First recorded in 1350–1400, unhorse is from the Middle English word unhorsen. See un-2, horse
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for unhorse

British Dictionary definitions for unhorse

/ (ʌnˈhɔːs) /

verb (tr)

(usually passive) to knock or throw from a horse
to overthrow or dislodge, as from a powerful position
rare to unharness horses from (a carriage, etc)
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