hardness

Mane (Îngilîzî)

1. (countable, uncountable) The quality of being hard.
2. (countable, uncountable) An instance of this quality; hardship.
3. (countable, uncountable) The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).
4. (countable, uncountable) The resistance to scratching, cutting, indentation or abrasion of a metal or other solid material.
5. (countable, uncountable) The penetrating ability of electromagnetic radiation, such as x-rays; generally, the shorter the wavelength, the harder and more penetrating the radiation.
6. (countable, uncountable) The measure of resistance to damage of a facility, equipment, installation, or telecommunications infrastructure when subjected to attack.
7. (countable) A measure of how hard a material is

Hevwate

firmness

stiffness

rigidity

solidity

severity

rigour

strength

toughness

cruelty

rigor

difficulty

roughness

harshness

ruggedness

inclemency

mercilessness

heartlessness

arduousness

severeness

compactness

strictness

rigourousness

callosity

callousness

crustiness

durability

hard

hardship

inflexibility

insensibility

intensity

relentlessness

rigorousness

rudeness

solidness

sternness

tightness

trouble

unfeelingness

quality of a flint

inhumanity

aridity

quality of marble

iron

knotty

dryness

obduracy

power

abruptness

rigid

Werger

dureté

Härte

durezza

dureza

dureza

hardheid

σκληρότητα

stugheid

Festigkeit

duresa

sévérité

difficulté

severità

solidité

Wekî (IPA) tê bilêvkirin

/ˈhɑɹdnəs/

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: hardness

Ji Old English mîras hatiye girtin: heardnes

In summary

From Middle English hardness, hardnesse, from Old English heardnes, from heard + -nes. Equivalent to hard + -ness.