What does 洪水 mean?
洪水 is a Japanese noun meaning “a flood, flooding” in English. It is written as 洪水 in kanji, こうずい in hiragana, and kouzui in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
洪水がその村を飲み込んでしまった。
The flood overwhelmed the village.