Brazilian fan palm having an edible root; source of a useful leaf fiber and a brittle yellowish wax.

有可食用根的扇叶葵，是一种有用树叶纤维和一种易碎的淡黄色蜡的来源。

youdao

For many, pursuit of a dream is the root source of their wealth.

FORBES: The Unctuous, Impoverishing Bigotry Of Class Warfare

From one source at root: a wrong standard of morality, of good and evil.

FORBES: By Eliminating Failure, The Government Robs Us Of Success