铁石心肠tiěshíxīnchángTop 40000Meanings1. to have a heart of stone2. hard-hearted3. unfeelingCharacters used铁iron石rock心heart肠intestinesExamples2他tā铁石心肠tiěshíxīncháng。He has a heart of stone.谁shéi能néng融化rónghuà你nǐ的de铁石心肠tiěshíxīncháng？Who could melt that stone heart of yours?