开凿

开凿	kāi záo	to cut (a canal, tunnel, well etc)
开	kāi	to open (transitive or intransitive) / (of ships, vehicles, troops etc) to start / to turn on; to put in operation; to operate; to run / to boil / to write out (a prescription, check, invoice etc) / (directional complement) away; off / carat (gold) / abbr. for Kelvin, 开尔文 / abbr. for 开本, book format
凿	záo	(bound form) chisel / to bore a hole; to chisel; to dig / (literary) certain; authentic; irrefutable / also pr. [zuo4]