boot·less /ˈbutləs/
  (a.)無用的,無益者
  Boot·less a.  Unavailing; unprofitable; useless; without advantage or success.
     I'll follow him no more with bootless prayers.   --Shak.
  -- Boot*less*ly, adv. -- Boot*less*ness, n.
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  bootless
       adj : unproductive of success; "a fruitless search"; "futile years
             after her artistic peak"; "a sleeveless errand"; "a
             vain attempt" [syn: fruitless, futile, sleeveless,
              vain]