确凿

确凿	què záo	definite / conclusive / undeniable / authentic / also pr. [que4 zuo4]
确	què	variant of 确 / variant of 埆
确	què	authenticated / solid / firm / real / true
凿	záo	(bound form) chisel / to bore a hole; to chisel; to dig / (literary) certain; authentic; irrefutable / also pr. [zuo4]