相关单词近义词 powerless 无力的, useless 无用的, impotent 性无能的, ineffective 无效的, ineffectual （东西）无效的..., incapable 无能力的反义词toothed, 有齿的临近词toother, tooth, Tooth fracture, tooth displace, toothed roller, tooth fall out, toothed washer, tooth backlash, tooth armature, tooth addendum, toothed v belt, tooth dedendum 返回 toothlessness