凿

HSK 7-9

záo

to dig; to bore with a tool; to carve

to bore a hole; to chisel; to dig; (literary) certain; authentic; irrefutable; also pr. [zuo4]

他用凿子在石头上刻字。

tā yòng záozi zài shítou shàng kè zì.

He carved words into the stone with a chisel.

这个说法凿得很靠谱。

zhège shuōfǎ záo de hěn kuàopèi.

This saying is quite reliable.