“+ transitive verb
Etymology: Middle English unhorsen, from un- (II) + horsen to horse
: to dislodge from or as if from a horse : put out of action : overthrow , unseat
unhorse a rider
Republicans are in a scramble … to try to unhorse the state's Democratic senator — New York Times
reports of the maltreatment of the sick and wounded nearly unhorsed the … general staff — James Dugan