verb Download 🔗Share To harden the surface of iron or steel by infusing carbon into the surface layer. Examples : "The manufacturer casehardened the gears to make them more resistant to wear. " material technical industry Chat with AIVocabulary GamePractice Reading
verb Download 🔗Share (by extension) To make insensitive to hardship. Examples : "Years of working long hours and dealing with difficult customers had casehardened him, making him less sensitive to their complaints. " attitude character mind emotion Chat with AIVocabulary GamePractice Reading