Kovuuden
Kovuuden is the genitive form of the Finnish noun kovuus, which denotes hardness, toughness, or severity. In standard Finnish, kovuus refers to the quality or state of being hard or firm, and kovuuden is used when expressing possession or a relationship to that quality, for example in phrases like metallit kovuuden mittaaminen or kiven kovuuden arvo.
Etymology and grammatical note: Kovuus comes from the adjective kova, meaning hard or strong, with the suffix
Usage: In materials science and engineering, kovuus is commonly used to talk about hardness, with kovuuden mittaaminen
See also: kovuus (the base noun), kestävyys (durability), jäykkyys (stiffness), kovuuden mittaaminen (hardness measurement).