鐵石心腸

Simplified: 铁石心肠

tiěshíxīncháng ㄊㄧㄝˇ ㄕˊ ㄒㄧㄣ ㄔㄤˊ

    • to have a heart of stone
    • hard-hearted
    • unfeeling

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
heart of iron and stone
Meaning
Hard-hearted and not easily moved by emotion or pity. Critical. Close to English 'heart of stone'.

Sources