What does 排水 mean?
排水 is a Japanese noun meaning “drainage” in English. It can also be translated as “displacement” depending on context. It is written as 排水 in kanji, はいすい in hiragana, and haisui in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
学校はプールの水を月一回排水する。
The school drains the pool once a month.