คำว่า ' hardness ' ( N )
มีความหมายในภาษาไทยว่า ความแข็ง
คำที่คล้ายกัน : compactness; firmness; solidity
คำนิยามในภาษาอังกฤษ (definition) :
[n.] The quality or state of being hard, literally or figuratively.
[n.] The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched;-measured among minerals on a scale of which diamond and talc form the extremes.
[n.] The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes.