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

Related Words

Compare: お湯(ゆ) (hot water)

Compare: 熱湯(ねっとう) (boiling water)

Compare: 冷水(れいすい) (cold water)

general

Added 2026.5.13 12:10 · Revised 2026.9.16 12:58

27500/27514_onsui