没有不透风的墙méi yǒu bù tòu fēng de qiángmeiyoubutoufengdeqiang(idiom) no secret can be kept foreverCharacters in this word不no, not, un-墙wall有to have, to own, to possess没not, none, gone的aim, goal透to pierce, to penetrate, to pass through风windStudy it in Yanamino