POISON

I. noun see: potion Date: 13th century 1. a substance that through its chemical action usually kills, injures, or impairs an organism, b. something destructive or harmful, an object of aversion or abhorrence, a substance that inhibits the activity of another substance or the course of a reaction or process , II. transitive verb (~ed; ~ing) Date: 14th century 1. to injure or kill with ~, to treat, taint, or impregnate with or as if with ~, to exert a baneful influence on ; corrupt , to inhibit the activity, course, or occurrence of , ~er noun III. adjective Date: circa 1520 ~ous , venomous , impregnated with ~ ; ~ed