*impracticable*

a. 1. Not practicable; incapable of being performed, or accomplished by the means employed, or at command; impossible; as, an impracticable undertaking. [ 1913 Webster ]

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. [ 1913 Webster ]

This though, impracticable heart
Is governed by a dainty-fingered girl. Rowe. [ 1913 Webster ]

Patriotic but loyal men went away disgusted afresh with the impracticable arrogance of a sovereign. Palfrey. [ 1913 Webster ]

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. [ 1913 Webster ]