硬度

1. Origins, structure, and basic meaning

• Structure: 硬度 (こうど) combines hardness 硬 and degree 度 to denote how hard a material is.
• Basic usage: It is compared among minerals and specified for a material used in a component.

2. Common pitfalls and similar expressions

• Hardness is one material property
  • 硬度 concerns resistance associated with hardness and does not by itself describe every aspect of strength or toughness.