impractical -- (not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution")
airy, impractical, visionary, Laputan, windy -- (not practical or realizable; speculative; "airy theories about socioeconomic improvement"; "visionary schemes for getting rich")
(Sound)
