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noundevoid of passion or feeling; hardheartedness
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type of: -
nounexcessive sternnesstype of:
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nounthe quality of being difficult to do
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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:
Examples of hardness
- "he assigned a series of problems of increasing hardness"
- "the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present"