See also: 铁石心肠

Chinese

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iron rock; stone; 10 pecks
heart and intestines; character; heart
heart and intestines; character; heart; intention
 
trad. (鐵石心腸) 心腸
simp. (铁石心肠) 心肠
anagram 鐵心石腸铁心石肠
Literally: “iron and stone-made heart and intestines”.

Pronunciation

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Idiom

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鐵石心腸

  1. stone-hearted; unmoved