Last Updated
：2025/11/20
hardness
IPA(Pronunciation)
Noun
countable
uncountable
Japanese Meaning
硬さ：物体が硬い性質を示す状態 / 困難や苦労：この性質の具体例としての苦労、困難な状況 / 硬度（水）: 水中に溶解したカルシウム炭酸塩の量を示す（ppmで表現される）
Sense（3）
Sense（4）
Sense（5）
（ plural ）
Quizzes for review
The quality of being hard. / An instance of this quality; hardship. / (inorganic chemistry) The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).
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hardness
The hardness of the steel made it ideal for cutting tools.
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The hardness of the steel made it ideal for cutting tools.
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