相关单词近義詞 powerless 無力的, useless 無用的, impotent 性無能的, ineffective 無傚的, ineffectual （東西）無傚的..., incapable 無能力的反義詞toothed, 有齒的臨近詞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