温水(おんすい)

おんすい
noun
warm water; heated water
1. warm water; heated water
Water that has been heated to a comfortable warm temperature. A slightly technical or product-related term — most commonly seen on appliances (washlets, washing machines, pools) rather than in casual conversation, where お湯(ゆ) is the everyday word.
温水(おんすい)プールで泳(およ)いだ。
I swam in a heated pool.
温水(おんすい)洗浄(せんじょう)便座(べんざ)が設置(せっち)されている。
A warm-water washlet has been installed.
洗濯(せんたく)機(き)には温水(おんすい)洗(あら)いの機能(きのう)がついていて、汚(よご)れがよく落(お)ちる。
The washing machine has a warm-water setting, which gets stains out well.

Compound of 温(おん) (warm) + 水(すい) (water). A slightly technical term; not used in everyday conversation about drinks or baths, where お湯(ゆ) is normal.

COMMON COLLOCATIONS:

  • 温水(おんすい)プール: heated pool
  • 温水(おんすい)洗浄(せんじょう)便座(べんざ): warm-water washlet (toilet seat)
  • 温水(おんすい)暖房(だんぼう): hot-water heating system
  • 温水(おんすい)器(き): water heater

SIMILAR WORDS:

  • お湯(ゆ): hot water — everyday word for hot/warm water for tea, baths, etc.
  • 熱湯(ねっとう): boiling water — water heated to or near the boil
  • 冷水(れいすい): cold water — the temperature counterpart
general
Added 2026.5.13 12:10
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