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noundevoid of passion or feeling; hardheartedness
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nounexcessive sternnesstype of:
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"he assigned a series of problems of increasing hardness"nounthe quality of being difficult to do
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"the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present"nouna quality of water that contains dissolved mineral salts that prevent soap from latheringtype of:
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nounthe property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scaleOpposite:type of:
Definition that contains hardness
- lead mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil
- temper the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking
- temper bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling
- cured (used of rubber) treated by a chemical or physical process to improve its properties (hardness and strength and odor and elasticity)
- brazen made of or resembling brass (as in color or hardness)
- toughness the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking
- steely resembling steel as in hardness
- steely resembling steel in hardness
- normalize bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling
- adamantine having the hardness of a diamond