Hardness

Devoid of passion or feeling; hardheartedness

Excessive sternness

The quality of being difficult to do

Synonyms

Ruggedness

Derivation

Hard

Examples

He assigned a series of problems of increasing hardness

A quality of water that contains dissolved mineral salts that prevent soap from lathering

Type of

Quality

Examples

The costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present

The property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale