Last Updated
：2025/12/07
硬水
Hiragana
こうすい
Noun
Japanese Meaning
カルシウムやマグネシウムなどの金属イオンを多く含む水。石鹸の泡立ちが悪く、湯あかが生じやすい。 / 地質や水源の影響により、ミネラル分の含有量が高い飲料水の分類。軟水に対する概念。
Easy Japanese Meaning
カルシウムなどがたくさんふくまれていて、せっけんがあわ立ちにくい水
Sense（1）
(chemistry) hard water
（ canonical ）
（ romanization ）
（ romanization ）
（ hiragana historical ）
（ hiragana ）
Quizzes for review
See correct answer
硬水
See correct answer
Hard water contains a lot of calcium and magnesium ions.
Hard water contains a lot of calcium and magnesium ions.
See correct answer
硬水はカルシウムやマグネシウムのイオンが多く含まれています。
Japanese - English
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