Potent
-
helpless, unexciting, inoperative, unable, unseasoned, fragile, inactive, unproductive, incompetent, diffuse, powerless, loose, inept, watered-down, disabled, fruitless, thin, subordinate, watery, incapable, inexpert, obscure, thinned, frail, feeble, inefficacious, unsuccessful, bootless, ineffective, dull, anonymous, minor, nameless, secondary, mild, hollow, inefficient, invalid, boring, apathetic, unfit, little, weakened, uninfluential, empty, soft, uncelebrated, counterproductive, unnecessary, impotent, pointless, diluted, useless, inarticulate, unskilled, flimsy, unqualified, unhealthy, dilute, vain, unknown, unimportant, inessential, light, weak, inexperienced, insignificant, delicate, idle, ineffectual, passive, unskillful, infirm.