Synonyms and related words :
barren, bootless, broken, counterproductive, effete, empty, etiolated, fatuitous, fatuous, feckless, fruitless, functionless, futile, haywire, in disrepair, inadequate, inane, inapplicable, ineffective, ineffectual, inefficacious, inoperable, invalid, nonfunctional, nonutilitarian, nugacious, nugatory, of no force, on the blink, on the fritz, otiose, out of commission, out of condition, out of gear, out of joint, out of kelter, out of kilter, out of order, out of repair, out of tune, out of whack, sterile, unavailing, unconducive, unemployable, unfit, unhelpful, unsuitable, unusable, unworkable, useless, vain