无可救药

lit. no antidote is possible (idiom); incurable / incorrigible / beyond redemption

not to have / no / none / not / to lack / un- / -less

can't

can / may / able to / to approve / to permit / to suit / (particle used for emphasis) certainly / very

used in 可汗[ke4 han2]

variant of 救[jiu4]

to save / to assist / to rescue

leaf of the iris / variant of 藥|药[yao4]

medicine / drug / substance used for a specific purpose (e.g. poisoning, explosion, fermenting) / CL:種|种[zhong3],服[fu4],味[wei4] / to poison