Unwise to implement or maintain in practice: Refloating the sunken ship proved impractical because of the great expense.
Incapable of dealing efficiently with practical matters, especially finances.
Not a part of experience, fact, or practice; theoretical.
Impracticable. See Usage Note at impracticable.
[im-prak-ti-kuh
l] 
(ĭm-prāk'tĭ-kəl)