Japanese word

排水

Pronunciation

Romajihaisui

Meaning

  • noundrainage

Example

大雨の後は排水に時間がかかります。ō ame no ato wa hai sui ni ji kan ga ka ka ri ma su

It takes time for the water to drain after heavy rain.

Illustration for 排水 (drainage)

More examples

庭の排水をよくするために、土に砂を混ぜます。niwa no hai sui o yo ku su ru ta me ni tsuchi ni suna o ma ze ma su

To improve drainage in the garden, we mix sand into the soil.

Core concept

Centers on moving unwanted water away from a place through natural flow or a system.

Common phrases

  • 排水を改善するhai sui o kai zen su ru

    improve drainage

  • 排水の経路hai sui no kei ro

    drainage route

  • 排水を妨げるhai sui o samata ge ru

    obstruct drainage

Similar words

放流hōryū: The intentional release of water into a river, channel, or other area.
排液haieki: The removal of liquid waste from a tank, machine, or facility.
水抜きmizunuki: The removal of water from a place or container.

Definition in Japanese

不要な水を外へ流して取り除くこと。また、流し出された水。fu yō na mizu o soto e naga shi te to ri nozo ku ko to ma ta naga shi da sa re ta mizu

Word origin

排水 (haisui, "drainage") combines 排 (hai, "expel") and 水 (sui, "water"), giving the word its basic sense of sending water away.

Usage tips

  • On product labels and facility notices, 排水 (haisui) often signals where water is released or how a system handles it, making it a useful clue in homes, factories, and public buildings.

Other meanings

  • wastewaternoun
  • seweragenoun

Related words

  • 排水性haisuiseidrainage capacitynoun

Word lists with this word