相关单词同义词useless, invalid, 近义词 ineffectual （东西）无效的..., futile 无效的, fruitless 不成功的, abortive 失败的, negative 否定的, worthless 无价值的, invalid 无效的, unsuccessful 不成功的, unproductive 不生产的, lame 无说服力的, useless 无用的, vain 自负的, hopeless 没有希望的, feeble 虚弱的, uneffective 无效的, inefficient 无效率的, unable 不能的反义词effective, 有效的临近词ineffectual, ineffable, ineffectively, ineffectiveness, ineffective call, ineffective rise, ineffective code, ineffective time, ineffective dose, ineffective tiller, ineffective market, ineffective strain相似词inebriate, inebriated, inedible, ineffable, ineffectual, inefficient, inelastic, inelegant, 返回 ineffective