硬こう度ど

こ

う

ど

Common wordFreq.FrequencyTop 50,000

Meanings

Primarily a scientific/technical term for the physical property of hardness, such as mineral hardness or material hardness. Also used figuratively for water hardness.

ダイヤモンドは硬こう度どが非ひ常じょうに高たかい。
Diamond has extremely high hardness.
この地ち域いきの水みずは硬こう度どが高たかい。
The water in this area has high hardness.

See all 26 example sentences ›

Usage patterns

〈物もの〉の硬こう度どが高たかいfor something's hardness to be high
この地ち域いきの水みずは硬こう度どが高たかい。
The water in this area has high hardness.
〈物もの〉の硬こう度どを測はかるto measure the hardness of something
鉱こう物ぶつの硬こう度どを測はかる道どう具ぐがある。
There is a tool for measuring the hardness of minerals.

Kanji

硬stiff, hard
度degrees, occurrence, time

Related words

硬かたさN1
硬度 is the technical, measurable term for hardness (e.g., mineral or water hardness), while 硬さ is the everyday word for how hard or stiff something feels.
硬こう質しつ
硬度 is the technical, measurable term for hardness (e.g. Mohs hardness), while 硬質 is a broader descriptive term for something being hard or rigid.

Don't confuse with

高こう度どN2
硬度 (hardness) and 高度 (altitude, highness) are pronounced identically but refer to completely unrelated properties.
強きょう度ど
硬度 measures a material's hardness (resistance to scratching or indentation), while 強度 measures its overall strength or durability under stress.

Word family

モース硬こう度ど
Mohs hardness
ロックウェル硬こう度ど
Rockwell hardness

Etymology

Compound of 硬 (こう, 'hard') and 度 (ど, 'degree'), forming a technical term for the degree of hardness.