The term associated with an additive that has the ability to slow down the rate of a chemical reaction is "inhibitor."
Explanation:
1. An inhibitor is a substance that decreases or slows down the rate of a chemical reaction without being consumed in the reaction itself.
2. Inhibitors work by interfering with the reaction process, typically by blocking or hindering the active sites of enzymes or altering the reaction mechanism.
3. For example, in the context of rusting of iron, a common inhibitor like paint or coating is applied to slow down the oxidation process and prevent rust formation.
4. Unlike an accelerator, which speeds up a reaction, an inhibitor acts in the opposite manner by impeding the reaction progress.
