Keménységük
Keménységük is a Hungarian term that translates to "their hardness" or "their toughness." It is a word that can be used in various contexts, often referring to the physical properties of materials or the resilience of living beings.
In a scientific or engineering context, keménységük would describe the resistance of a substance to scratching,
Beyond the physical, keménységük can also be used metaphorically to describe the character or spirit of individuals