| 凿 |
záo kōng | to open an aperture / (extended meaning) to cut a way through / to open up a road |
| 凿 |
záo | (bound form) chisel / to bore a hole; to chisel; to dig / (literary) certain; authentic; irrefutable / also pr. [zuo4] |
| 空 |
kōng | empty / air / sky / in vain |
| 空 |
kòng | to empty / vacant / unoccupied / space / leisure / free time |