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1. Oxford American Dictionary

   hardness

   • IPA[ˈhärdnəs]

   美式

   • n.
     the quality or condition of being hard

   • noun: hardness, plural noun: hardnesses

2. • 釋義
   • 相關詞

   n.

   名詞

   • 1. the quality or condition of being hard people complained about the hardness of the chairs a lack of mental hardness 同義詞 firmness, solidity, stiffness, rigidity, denseness, ... 更多inflexibility, inelasticity, resistance, hard-heartedness, heartlessness, cold-heartedness, lack of compassion, lack of feeling, lack of sentiment, callousness, unkindness, flintiness, steeliness, harshness, severity, strictness, sternness, toughness反義詞 softness, compassion, kindness

   permanent hardness

   • n.
     the presence in water of mineral salts (chiefly calcium sulphate) that are not removed by boiling.

   Oxford Dictionary

   temporary hardness

   • n.
     the presence in water of mineral salts (chiefly calcium bicarbonate) that are removed by boiling.

   Oxford Dictionary

   Brinell hardness test

   • n.
     a test to determine the hardness of metals and alloys by hydraulically pressing a steel ball ...

   Oxford American Dictionary

3. • 更多解釋

   hardness

   • IPA[ˈhɑːdnəs]

   英式

   • n.
     the quality or condition of being hard: people complained about the hardness of the chairs a lack of mental hardness

   Oxford Dictionary