墙角 (qiángjiǎo): corner (where two walls meet)

Measure Word

一个墙角 gè

猫躲在墙角里不出来。

Māo duǒ zài qiángjiǎo lǐ bù chūlái.

The cat is hiding in the corner and won't come out.

墙角长了一片青苔。

Qiángjiǎo zhǎng le yīpiàn qīng tái.

Moss has grown in the corner of the wall.

usage

挖墙角 (wā qiángjiǎo, 'to dig at a wall corner') is a common idiom meaning to undermine someone or poach their people/resources.

墙 qiáng

角 jiǎo