硬度
Hardness refers to the degree or level of how hard a material is, often measured scientifically. It is commonly used to describe the physical properties of minerals, metals, or the mineral content in water (water hardness).
Exemples
3 sur 5この地域の水道水は硬度が高いです。
The tap water in this area has high hardness.
製品の品質を保つために、金属の硬度を測定します。
To maintain product quality, we measure the hardness of the metal.
この石、硬度がすごくて全然削れないよ。
This stone is so hard (high hardness) that I can't scrape it at all.
Famille de mots
Astuce mémo
The first kanji 硬 (hard) contains the radical for stone (石). Think of measuring the 'degree' (度) of a 'stone' (石).
Quiz rapide
ダイヤモンドはすべての鉱物の中で最高の___を誇る。
Correct !
La bonne réponse est : 硬度
Exemples
この地域の水道水は硬度が高いです。
everydayThe tap water in this area has high hardness.
製品の品質を保つために、金属の硬度を測定します。
formalTo maintain product quality, we measure the hardness of the metal.
この石、硬度がすごくて全然削れないよ。
informalThis stone is so hard (high hardness) that I can't scrape it at all.
モース硬度は、鉱物の引っかき傷に対する耐性を示す尺度である。
academicThe Mohs scale of hardness is a measure indicating a mineral's resistance to scratching.
弊社は、硬度1000以上の超硬材料を専門に扱っております。
businessOur company specializes in cemented carbide materials with a hardness of over 1000.
Famille de mots
Collocations courantes
Phrases Courantes
硬度成分
hardness components (minerals in water)
鉛筆硬度
pencil hardness (used for coatings)
ビッカース硬度
Vickers hardness
Souvent confondu avec
Pronounced the same (kōdo), but '高度' means altitude or high-level, whereas '硬度' means hardness.
'Katasa' is a general word for hardness used in daily life, while 'Kōdo' is the technical/scientific term.
Notes d'usage
Use 'kōdo' when discussing technical specifications, water quality reports, or mineralogy. In casual conversation about how hard an object feels to the touch, 'katasa' is more natural.
Erreurs courantes
The most common mistake for learners is writing the kanji for altitude (高度) instead of hardness (硬度) because they share the same reading.
Astuce mémo
The first kanji 硬 (hard) contains the radical for stone (石). Think of measuring the 'degree' (度) of a 'stone' (石).
Origine du mot
A Sino-Japanese compound (kango) consisting of 硬 (hard/stiff) and 度 (degree/limit/measure).
Modèles grammaticaux
Contexte culturel
Water hardness is a frequent topic in Japan because Japanese tap water is almost exclusively soft water, which affects the taste of tea and rice.
Quiz rapide
ダイヤモンドはすべての鉱物の中で最高の___を誇る。
Correct !
La bonne réponse est : 硬度
Vocabulaire associé
Mots lis
協力
A1Cooperation or collaboration where two or more people combine their efforts to achieve a common goal. It is used in both personal and professional settings to describe working together as a team or providing assistance.
提案
A1A suggestion or proposal of a plan or idea for others to consider. It is used in both casual conversations and professional meetings to introduce a potential course of action.
輸出
A1The act of sending goods or services produced in one country to another country for sale or trade. In Japanese, it functions as a noun and a suru-verb, representing the 'exit' of products from a domestic market.
輸入
A1The act of bringing goods, services, or materials into a country from abroad for sale or use. In Japanese, it functions as a noun or can be combined with 'suru' to become a verb meaning 'to import'.
資源
A1Shigen refers to valuable materials or assets, such as natural minerals, energy sources, or human talent, that can be used for production or survival. It is widely used in economics, environmental science, and daily life to describe both raw materials and abstract wealth.
保護
A1The act of keeping someone or something safe from harm, damage, or loss by providing care or creating boundaries. It is a versatile term in Japanese used for social welfare, environmental conservation, and digital security.
観察
A1Observation is the act of watching someone or something carefully in order to gain information or understand a process. It is frequently used in scientific studies, nature analysis, and describing the act of paying close attention to details.
競争
A1Kyousou refers to the act of competing or vying with others to achieve a goal, win a prize, or establish superiority. It is a versatile term used in sports, business, and academics to describe both structured contests and general rivalry.
拡大
A1The act of making something larger in size, scale, or scope. It is frequently used for physical enlargement (like a photo) or abstract growth (like a business or a problem).
製造
A1The process of making or producing goods, typically on a large scale using machinery. It refers specifically to industrial manufacturing rather than making things by hand on a small scale.
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