unsaddle

verb

Etymology: From Middle English onsadelen, unsadelen, unsadlen, equivalent to un- + saddle.

1. To remove a saddle.

   “[…] sette him vppe, and tye him in his bridle to the bare Racke, and all to rubbe and chafe him, insomuch that if hee be eyther wette with sweate or any other thing, you leaue hym not till he be as dry as may be, then vnsaddle him, rub hys backe thorowly […]”

   “She’s gone, by the Lord! fairly stole away, with that poaching, concy-catching rascal! However, I won’t follow her; no, damme; take my whip, and my cap, and my coat, and order the groom to unsaddle the horses; I won’t follow her the length of a spur-leather.”

2. To throw (a rider) from the saddle.