workable Antonyms

unworkable as useful as tits on a bull unrealizable unfeasible undoable unreachable out of whack out of service out of order out of gear out of commission on the fritz unserviceable unsustainable non-working about as useful as a chocolate teapot gone kaput not in working order not functioning gone phut gone haywire conked out acting up absolutely impossible not working as dead as mutton on the blink nonworkable non-workable inactive impractical impracticable impossible idle faulty down dormant defective bust bullheaded inoperative shot unusable non-functional buggered behind the curve dysfunctional malfunctioning knackered broken-down