heart of stone

figuratively idiomatic

(figuratively, idiomatic) A stonehearted character, stern or cruel nature.

Japanese Meaning

冷淡な心を持つ、情け容赦のない性格 / 無情で厳格な性質 / 不感情で冷酷な態度

Her heart of stone refused to soften even after his sincere apologies.

彼女の心は石のように冷たく、彼の誠実な謝罪にも決して和らがなかった。

Sense（1）

(figuratively, idiomatic) A stonehearted character, stern or cruel nature.

She's got a heart of stone.

hearts of stone

（ plural ）