hydrate
v.v. to drink enough water or give your body the liquid it needs to stay healthy. You also use this when you put moisture back into your skin or a dry object.
v. to cause to take up or combine with water; to restore or maintain fluid balance in a biological organism. Often used in medical or athletic contexts to describe the intake of fluids.
You should hydrate regularly during a long workout.
The doctor advised the patient to hydrate frequently with electrolyte solutions to recover from the fever.
Athletes must hydrate strategically before a competition to ensure peak muscular performance and avoid the cognitive decline associated with even mild dehydration.
From French hydrate, from Ancient Greek ὕδωρ (húdōr, “water”) + -ate.
The verb is used both transitively ('hydrate your skin') and intransitively ('remember to hydrate').