1 sentence for 虚 (xū — weak)

1. 大病之后他的身体很虚，需要好好调理。

   dà bìng zhī​hòu tā de shēn​tǐ hěn xū, xū​yào hǎo​hǎo tiáo​lǐ.

   After his serious illness, his body is very weak and needs proper recuperation.

   Source: Dong Chinese Dictionary