abortive, aimless, barren, bootless, counterproductive, effete, emasculate, empty, etiolated, failed, failing, fatuitous, fatuous, featherweight, feckless, forceless, fruitless, futile, ill-qualified, impotent, inadequate, inane, incapable, incapable of, incompetent, ineffectual, inefficacious, inefficient, inept, inferior, inoperative, invalid, invertebrate, lame, lightweight, maladjusted, manque, meaningless, miscarried, miscarrying, no-account, no go, not equal to, not up to, nugacious, nugatory, of no account, of no effect, of no force, of no use, pointless, powerless, purposeless, spineless, sterile, stickit, stillborn, successless, superfluous, unable, unable to, unadapted, unadjusted, unauthoritative, unavailable, unavailing, unendowed, unequipped, unfit, unfitted, unfortunate, ungifted, unproductive, unqualified, unsuccessful, untalented, useless, vain, weak, without any weight, worthless