排はい水すい

は

い

す

い

Common wordJLPTN1Freq.FrequencyTop 10,000

排水する · noun or participle which takes 'suru'

Form	Positive	Negative
Dictionary	排はい水すいする	排はい水すいしない
Polite	排はい水すいします	排はい水すいしません
Past polite	排はい水すいしました	排はい水すいしませんでした
Past	排はい水すいした	排はい水すいしなかった
Te-form	排はい水すいして	排はい水すいしないで
Desire	排はい水すいしたい	排はい水すいしたくない
Potential	排はい水すいできる	排はい水すいできない
Passive	排はい水すいされる	排はい水すいされない
Causative	排はい水すいさせる	排はい水すいさせない
Causative passive	排はい水すいさせられる	排はい水すいさせられない
Volitional	排はい水すいしよう
Polite volitional	排はい水すいしましょう
Imperative	排はい水すいしろ	排はい水すいするな
Conditional	排はい水すいすれば	排はい水すいしなければ
Tara conditional	排はい水すいしたら	排はい水すいしなかったら

Meanings

noun, noun or participle which takes 'suru', transitive verb, intransitive verb

drainage; draining; pumping out water; sewerage

Refers to removing water or liquid waste, either as a process or a system. Used for both domestic and industrial contexts.

大おお雨あめで排はい水すいが追おいつかない。
The drainage can't keep up with the heavy rain.
工こう場じょうは処しょ理りした水みずを川かわに排はい水すいしている。
The factory drains treated water into the river.

noun, noun or participle which takes 'suru', transitive verb, intransitive verb

displacement

Technical use in physics or engineering for the volume of fluid displaced by an object. Less common than the drainage sense.

船ふねの排はい水すい量りょうはその重おもさを示しめす。
A ship's displacement indicates its weight.

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Usage patterns

〈場ば所しょ〉は排はい水すいがいいa place has good drainage
この畑はたけは排はい水すいがいい。
This field has good drainage.
〈物もの〉を排はい水すいするto drain out (a liquid)
タンクの水みずを排はい水すいする。
Drain the water out of the tank.
〈場ば所しょ〉から排はい水すいするto drain (water) from a place
工こう場じょうから排はい水すいする。
They drain wastewater from the factory.

Kanji

排repudiate, exclude, expel
水water

Transitive / intransitive

排水 can be used both transitively (排水する, e.g. 「タンクの水を排水する」 'to drain the water from the tank') and intransitively in descriptive contexts (e.g. 「この道路は排水がいい」 'this road drains well').

Related words

放ほう水すい
排水 focuses on draining or pumping water away, while 放水 emphasizes releasing or spraying water outward.
下げ水すいN2
排水 is the general term for draining or discharging water of any kind, while 下水 specifically denotes wastewater or the sewer system carrying it.
汚お水すい
排水 refers to water that has been drained or discharged and is not necessarily dirty, whereas 汚水 specifically emphasizes contamination.

Opposites

給きゅう水すい sense 1
給水 means supplying or delivering water, the opposite process of 排水, which means draining water away.
貯ちょ水すい
貯水 means storing water for later use, while 排水 means draining water away, the opposite process.
取しゅ水すい
取水 is drawing water in from a river or lake, while 排水 is discharging or draining water out, the reverse process.
灌かん漑がいN1
灌漑 means supplying water to land, while 排水 means draining water away from it.

Don't confuse with

下げ水すいN2sense 1
下水 refers to the wastewater or sewage itself, while 排水 refers to the act or system of draining that water away.
排はい出しゅつ sense 1
排出 is the broader term for expelling or discharging any substance (liquid, gas, waste), whereas 排水 specifically concerns water or liquid drainage.

Word family· 14

給きゅう排はい水すい
water supply and drainage
排はい水すい口こう
drain outlet; drain opening; overflow drain
排はい水すい孔こう
drain hole; scupper; osculum
排はい水すい溝こう
drainage ditch; gutter; drain
排はい水すい管かん
drainpipe; drainage pipe

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排はい水すい芯しん
toilet drain outlet
排はい水すい量りょう
displacement (of a ship) · volume of wastewater
温おん排はい水すい
thermal discharge; warm water discharge
非ひ排はい水すい
undrained; non-drainage
工こう場じょう排はい水すい
industrial wastewater; factory effluent
排はい水すい条じょう件けん
drainage conditions

See all 14 in Explore →

Etymology

Compound of 排 (expel, discharge) and 水 (water). The displacement sense is a semantic extension from the idea of water being pushed aside.