Rejuvener

Part of speech: noun

Definitions

1. A substance, treatment or agent that restores youthful vigor and freshness to a person, object or thing that has grown worn
2. Something that brings back a youthful appearance or renewed energy by reviving what has become old, tired or faded
3. An agent or product that makes something look or feel young and lively again after a period of decline

Etymology: "Rejuvener" is formed by adding the agent suffix "-er" to the verb "rejuvenate," so it literally names something that rejuvenates. "Rejuvenate" itself was formed in English in the early 1800s from the Latin "re-," meaning again, and "juvenis," meaning young, with the English suffix "-ate" turning it into a verb. The root "juvenis" also gave English "juvenile" and "junior," so the same idea of youthfulness runs through all three. The noun "rejuvener" is a much later and rarer creation. Dictionaries record it as a term for a product or treatment that restores youthful appearance, a usage that grew alongside the cosmetics and beauty-product marketing of the twentieth century. Like many commercial coinages, it follows the pattern of an established verb plus "-er," so it reads naturally without having a long documented history of its own.