Intensifier (noun)

1. A person or thing that intensifies or makes more intense.
2. A word or expression used to increase the strength or force of a statement, especially an adjective or adverb.
3. A substance used to increase the reaction rate or yield of a chemical reaction.

Origin:

Early 17th century: from french intensifieur, from intensifier (see intensify).

Examples:

1. The new fertilizer is a powerful intensifier that helps crops grow faster and healthier.
2. Words like 'very' and 'extremely' are common intensifiers in everyday language.
3. The new dye is a good intensifier for the colorimetric assay.
4. He added salt to the sauce to intensify the flavor.
5. The new drug is an intensifier for the cancer treatment.