poison with

poison (someone or an animal) with something

to render someone or an animal sick or dead with a poison. He intended to poison his wife with arsenic. Barry wanted to poison the cat with something that left no trace. He poisoned himself with the cleaning compound.

See also: poison

poison something with something

to render something poisonous with something. She poisoned the soup with arsenic. They are poisoning our water supply with pollutants.

See also: poison