jī zhòng nán fǎn
积重难返
词语解释
积重难返 [jī zhòng nán fǎn]
1 积存的问题或陋习很深，难以改变。
英 bad old practices die hard; it is difficult to get rid of deep-rooted practices; ingrained habits cannot be cast off overnight;
引证解释
1 见“积重难反”。