相关单词同义词free, groundless, 近义词 needless 不需要的, voluntary 自愿的, uncalled-for 不必要的, free 自由的, gratis 免费的, costless 不花钱的, complimentary 问候的, unwarranted 无根据的, wanton 淫乱的, unjustified 不合理的, unnecessary 不必要的, unreasonable 不合理的, superfluous 多余的, toll-free 免电话费的, cost-free 免费的, for nothing 免费, free of charge 免费, on the house 由店家出钱临近词gratuity, gratitude, gratuitously, gratuitous act, gratuitous loan, gratuitous gift, gratuitous goods, gratuitous gifts, gratuitous guest, gratuitous nature, gratuitous insult, gratuitous legacy相似词gratin, grating, gratis, gratitude, gratuity, graupel, gravadlax, grave, 返回 gratuitous