iron-heartedness

Noun

uncountable

The quality of being iron-hearted.

Japanese Meaning

鉄のような心、すなわち無慈悲で冷酷な性質を持つこと。 / 情け容赦なく、厳しい心情や態度を示す状態。

The iron-heartedness he displayed during the negotiations stunned even his closest allies.

交渉中に見せた彼の冷酷さは、最も親しい味方さえも驚かせた。

Sense（1）

The quality of being iron-hearted.