Pronunciation: /keɪs ˈhɑːrdnd/
noun a hardened outer layer or surface
A1 The case hardened steel was used to make durable tools.
A2 The locksmith used a case hardened lock to secure the door.
B1 The criminal was unable to break into the case hardened safe.
B2 The military used case hardened armor to protect their vehicles.
C1 The engineer designed a case hardened structure to withstand extreme conditions.
C2 The case hardened material was resistant to wear and tear.
adjective hardened by exposure to a process that makes it resistant to damage
A1 The case hardened criminal was finally caught by the police.
A2 The case hardened detective was known for solving the toughest of cases.
B1 The case hardened soldier showed no fear in the face of danger.
B2 Her case hardened attitude towards life made her a formidable opponent in business.
C1 The lawyer's case hardened demeanor in court earned him a reputation for being ruthless.
C2 Despite his case hardened exterior, he had a soft spot for animals and always donated to shelters.
formal The metal was case hardened to increase its durability.
informal I heard they case hardened the new tools for better performance.
slang The mechanic said he would case harden the car parts to make them last longer.
figurative His experiences in life had case hardened him, making him tough and resilient.
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