unserviceable (adjective) impractical/impracticable: unrealistic
Sinonime: abstract,
absurd,
chimerical,
idealistic,
illogical,
impossible, impracticable,
improbable, inapplicable, inefficacious, infeasible, inoperable, irrealizable, ivory-tower, no-go, nonfunctional, nonviable, not a prayer,
otherworldly, out of the question,
quixotic,
romantic,
speculative, starry-eyed,
theoretical,
unattainable, unbusinesslike, unfeasible,
unreal, unserviceable, unusable, unwise, unworkable,
useless,
visionary,
wild, won't fly
Antonime: practicable,
practical,
probable,
realistic,
reasonable, tenable,
viable