洗面所|せんめんじょsenmenjo[0]heiban (flat)

1. nounwashroom; bathroom
   洗面所せんめんじょの栓せんを抜ぬくと、水みずがガバガバ流れ出ながれだした。↗

   When I unplugged the bathroom sink, the water gushed down the drain.

• Synonym手洗い場てあらいばNeutralA spot for washing your hands or face, usually in public facilities; 「洗面所」 is typically the washroom inside a home.
• Synonym手水場ちょうずばWrittenAn old term for a hand-washing spot beside a toilet, or for the toilet itself; rarely used today.
• Related手洗いてあらいNeutralLiterally washing one's hands, but also a euphemism for the toilet; 「洗面所」 focuses on the facilities for washing your face, brushing your teeth and doing makeup.
• Relatedお手洗いおてあらいFormalThe polite form of 「手洗い」 and the most common polite word for the toilet; 「洗面所」 is a washroom, so as a euphemism it sounds more indirect.
• Related便所べんじょNeutralA blunt, direct word for the toilet; 「洗面所」 is a place to wash up, or a softer euphemism for the toilet.
• RelatedトイレNeutralThe most common everyday word for the toilet; 「洗面所」 mainly means the washroom where the sink is.
• RelatedトイレットNeutralThe original form of 「トイレ」; today it mostly appears in compounds like 「トイレットペーパー」 and is rare on its own.
• RelatedラバトリーWrittenA loanword seen mainly on signs in airplanes and other public facilities; not used in everyday speech.
• Related化粧室けしょうしつNeutralAn elegant name for the toilet, used on signs in malls, hotels and other public places; 「洗面所」 usually means the washroom at home.

For the toilet, say 「トイレ」 in everyday speech and 「お手洗い」 when being polite; 「化粧室」 appears on signs in malls and hotels. 「洗面所」 itself is the home washroom where you wash your face and brush your teeth, and can also serve as a euphemism for the toilet. 「便所」 is blunt, 「手洗い」 is a softer euphemism, and 「トイレット」「ラバトリー」「手水場」 are rare in daily use.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 洗面せんめん・化粧けしょうの設備せつびを備そなえた所ところ。
2. 便所べんじょの婉曲えんきょく語ご。手洗てあらい。