飲鴆止渴

1. • lit. drinking poison in the hope of quenching one's thirst (idiom)
2. • fig. a supposed remedy that only makes matters worse

Character by character

• 飲(yǐn)drink
• 鴆(zhèn)legendary bird whose feathers can be used as poison
• 止(zhǐ)stop
• 渴(kě)thirsty