1. the quality or state of being iron; the characteristic properties or nature of iron as a metal
Usage: rare; technical
2. the quality of being hard, strong, or unyielding; firmness or inflexibility
Usage: figurative; literary

Examples

• The ironness of the metal made it suitable for construction.
• Her ironness of will allowed her to persevere through difficult times.
• The ironness of his resolve was evident in every decision he made.
• The bridge's ironness ensured it could withstand heavy loads.