にゅうよく入浴nyuuyoku
1.

The act of immersing oneself in a bath, typically as a means of cleansing the body and relaxing.

2.

The process of enjoying a warm water soak, often associated with personal hygiene and leisure activities in a bath setting.

Example:

私は1日おきに入浴する。

にゅうよくざい入浴剤nyuuyokuzai
1.

A substance added to bathwater to enhance the bathing experience, often providing soothing or aromatic properties.

2.

A product used in baths that can improve the texture, fragrance, or therapeutic effects of the water.

3.

An additive specifically designed to dissolve in hot water, creating a relaxing environment for bathing.

4.

A mixture intended to enrich bathwater, often containing minerals, essential oils, or fragrances for comfort and well-being.