饮鸩止渴

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

old variant of 飲|饮[yin3]

to drink

to give (animals) water to drink

legendary bird whose feathers can be used as poison / poisonous / to poison sb

to stop / to prohibit / until / only

thirsty