挖墙根

Traditional (Taiwan): 挖牆根

wāqiánggēn ㄨㄚ ㄑㄧㄤˊ ㄍㄣ

    • to undermine someone from the foundations

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
to dig at the wall's foot
Meaning
Variant of 挖墙脚: to undermine someone from the foundations.

Sources