im·prac·ti·ca·ble /(ˌ)ɪmˈpræktɪkəbəl/
 (a.)不能實施的,難辦的,做不到的


 Im·prac·ti·ca·ble a.
 1. Not practicable; incapable of being performed, or accomplished by the means employed, or at command; impossible; as, an impracticable undertaking.
 2. Not to be overcome, persuaded, or controlled by any reasonable method; unmanageable; intractable; not capable of being easily dealt with; -- used in a general sense, as applied to a person or thing that is difficult to control or get along with.
 This though, impracticable heart
 Is governed by a dainty-fingered girl.   --Rowe.
    Patriotic but loyal men went away disgusted afresh with the impracticable arrogance of a sovereign.   --Palfrey.
 3. Incapable of being used or availed of; as, an impracticable road; an impracticable method.
 Syn: -- Impossible; infeasible. -- Impracticable, Impossible. A thing is impracticable when it can not be accomplished by any human means at present possessed; a thing is impossible when the laws of nature forbid it. The navigation of a river may now be impracticable, but not impossible, because the existing obstructions may yet be removed. “The barons exercised the most despotic authority over their vassals, and every scheme of public utility was rendered impracticable by their continued petty wars with each other.” --Mickle. “With men this is impossible, but with God all things are possible.” --Matt. xix. 26.

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 impracticable
      adj : not capable of being carried out or put into practice;
            "refloating the sunken ship proved impracticable
            because of its fragility"; "a suggested reform that was
            unfeasible in the prevailing circumstances" [syn: infeasible,
             unfeasible, unworkable]