sag

vt. 下垂(凹陷,下跌,塌箱)
n. 垂度(下垂,经济萧条,物价下跌)

The villagers shored up sagging huts.

村民们撑起摇摇欲坠的茅棚。

The chair sagged down under the fat man's weight.

椅子经这胖人一坐便压弯了。