unhorse

To cause to fall from a horse.

To overthrow or dislodge; upset.

To throw or strike down from a horse; cause to dismount or fall from the saddle.

To deprive of a horse or horses; remove the horse or horses from.

To throw from a horse; to cause to dismount; also, to take a horse or horses from.

To forcibly remove from a horse.

To disrupt or unseat; to remove from a position.

alight from (a horse)