viable Antonyms

extremely unlikely dead and gone buggered away with the fairies unworkable dysfunctional broken-down unreasonable ridiculous inoperative inconceivable inactive inviable out of service gone kaput gone phut gone haywire conked out acting up hardly likely absolutely impossible non-working unsustainable unfeasible unachievable impractical impracticable impossible dead cureless crazy crazed bust broken brainsick angry abysmal absurd abnormal defective demented idle idiotic hopeless haggard futile foolish faulty dreadful down