hydrate

/ˈhaɪdreɪt/
verb
  1. To supply water or moisture to something, especially the body.
    • Remember to hydrate before and after your workout.
    • Plants need rain to hydrate their roots.
    • The lotion helps hydrate dry skin during winter.
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noun
  1. A chemical compound that contains water molecules.
    • The mineral is a natural hydrate found in caves.
    • Copper sulfate is a common hydrate used in chemistry labs.
    • Some hydrates change color when they lose their water.