Moisture, water content, or fluid—amount of water present in something (e.g., body, food, soil).
スポーツの後はこまめに水分補給をしてください。
Please hydrate frequently after exercising.
この果物は水分が多くてジューシーだ。
This fruit has a lot of water content and is juicy.
化粧品は肌の水分を保つために作られている。
Cosmetics are made to help retain moisture in the skin.