oてあら手洗tearaiおてあら御手洗otearai
1.

A designated room or area in a building where individuals can attend to personal hygiene needs, typically equipped with facilities for washing hands and using the toilet.

2.

A public or private space that provides necessary amenities for relieving oneself, often found in homes, offices, and commercial establishments.

3.

An enclosed area providing privacy and cleanliness specifically for the act of urination and defecation, usually containing essential sanitation fixtures.

Example:

お手洗いはどこですか。