un·sad·dle /ˌʌnˈsædḷ/
  (v.)解下馬鞍;使落下馬
  Un·sad·dle v. t.
  1. To strip of a saddle; to take the saddle from, as a horse.
  2. To throw from the saddle; to unhorse.
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  unsaddle
       v : remove the saddle from; "They unsaddled their mounts" [syn:
           offsaddle] [ant: saddle]