The root of the tree rotted away.

树根烂了。

《新英汉大辞典》

But when the sun was up, it was scorched; and because it had no root, it withered away.

日头出来一晒，因为没有根，就枯干了。

youdao

Primarily, the split is based on the CVS or SVN root, which will become moot as projects migrate to Git and throw away the shackles of the enforced repository structure.

切分主要是基于CVS或者SVN根目录的，这会导致一场讨论：项目是要迁移到Git，还是摆脱执行库结构（enforced repository structure）的束缚。

youdao

And by making them go away you don't get to the root of your problem.

虽然恐慌症的症状得以消除,但你却无法找到问题的根源。

耶鲁公开课 - 心理学导论课程节选

Too many times they feel like they were duped by people coming in from the outside with a solution, implementing it, and then going away before it really took root.

FORBES: Connect

In the wild, where individuals of a species are dotted around and have to be sought out by their predators, having a few leaves nibbled away is a minor nuisance compared with having your root system strangled and poisoned by your neighbours.

ECONOMIST: Genetically modified weaklings | The

Two miles away, though, a Yiddish-speaking culture of a different kind took root and thrived: a township called Kirias Joel peopled by the Hasidic Satmarer sect, Jews at their most pious and least worldly.

ECONOMIST: You don’t have to be Jewish to live there | The