手洗い

1. Origins, structure, and basic meaning

• Structure: 手洗い combines 手, “hand,” with 洗い, “washing,” and is read てあらい.
• Basic usage: It can mean the act of washing one's hands or, depending on context, a washing area or restroom.
  • 調理を始める前に手洗いを徹底しましょう。 refers to a hygiene practice, while 手洗いは廊下の突き当たりにあります。 points to the restroom at the end of the hall.

2. Common pitfalls and similar expressions

• Action and place
  • 手洗いを徹底する means thoroughly practicing handwashing, while 手洗いは…にあります uses the word as a place whose location is given.
• Translation depends on context
  • Do not translate both examples as “handwashing” or both as “restroom.” The accompanying verb and location phrase determine the sense.
• 手洗い and トイレ
  • トイレ directly names a restroom in everyday language. 手洗い also means handwashing and can sound indirect or suited to a location notice when it denotes the facility.