noun
hydration; rehydration; fluid intake
Refers to the act or process of taking in water or fluids, especially to maintain bodily hydration. Common in health, sports, and medical contexts.
運動中はこまめな水分補給が大切です。
Frequent hydration is important during exercise.
noun or participle which takes 'suru'
Used with する to express the action of hydrating oneself or replenishing fluids. Often used in instructions or advice.
暑い日はしっかり水分補給してください。
Please make sure to hydrate well on hot days.