additives

/AE1 D AH0 T IH0 V Z/
noun
  1. 1

    A substance added to another substance or product to produce specific properties in the combined substance.

    โ€œOil may be used as an additive in gasoline to improve the lubrication of a small engine.โ€

  2. 2

    (grammar) A word or phrase that adds something, such as also, even, or nor.

Source: https://en.wiktionary.org/wiki/additive, https://en.wiktionary.org/wiki/additives