hardness

Meanings

Noun

• the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
• a quality of water that contains dissolved mineral salts that prevent soap from lathering
  • "the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present"
• devoid of passion or feeling; hardheartedness
• the quality of being difficult to do
  • "he assigned a series of problems of increasing hardness"
• excessive sternness

Synonyms

callosity, callousness, harshness, inclemency, insensibility, rigor, rigorousness, rigour, rigourousness, ruggedness, severeness, severity, stiffness, unfeelingness

Antonyms

softness