Definitions

1. noun

A highly toxic, usually colorless, crystalline or amorphous compound used in the manufacture of pesticides, wood preservatives, and in the treatment of certain cases of skin disease.

“The factory had to be shut down due to the high levels of arsenic found in the water supply.”

2. verb

To add a poisonous substance, especially arsenic, to something in order to damage or destroy it.

“The rival company tried to poison the competition by arsenicing their food supply.”