What does rehydrated mean?
Rehydrated describes something that has been given water again after being dried or otherwise deprived of moisture. The word is especially common in discussions of food preparation: dried rice, fruit, vegetables, and other products may be described as rehydrated after soaking or the addition of liquid. It is also used in medicine and physiology for restoring a person or tissue to a normally hydrated condition. In everyday language, rehydrated often carries a positive implication because it suggests renewal, recovery, and restored usability. Although “reconstituted” can be used as a synonym in food contexts, it sometimes has the broader sense of being put back together, whereas rehydrated specifically emphasizes the restoration of water or moisture.
To restore something to a hydrated or moist state by adding or replacing water.
"The instructions said to soak the mixture so that it could rehydrate before use."
This is the past tense and past participle of rehydrate.
Having been restored to a hydrated or moist state after drying or water loss.
"The cook added the rehydrated lentils to the soup."
It is commonly used attributively for dried foods and materials that have absorbed water again.
From freeze-dried to dinner-ready: rehydrated food gets its water back.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of rehydrated
The word rehydrate combines the prefix re-, meaning “again,” with hydrate, a verb derived from the Greek hydōr, meaning “water.” The formation developed as a counterpart to dehydrate, expressing the restoration of water or moisture to something that had been dried. Its closest cognates include hydrate, hydration, dehydrate, and dehydrated.
Related word forms
How rehydrated is actually used
The word is neutral in tone but is most common in technical, culinary, scientific, and medical contexts. As an adjective, it normally occurs before a noun; as a verb form, it can stand alone or function as a participle.
Easily confused with rehydrated
Dehydrated means having had water removed, whereas rehydrated means having water restored after drying or water loss.
Hydrated describes something in a sufficiently moist state, while rehydrated specifically indicates that it has been given water again.