caseharden
transitive verb
- Metallurgy to form a hard, thin surface on (an iron alloy)
- to make callous or unfeeling
See caseharden in American Heritage Dictionary 4
(kāsˈhärˌdn)
transitive verb case·hard·ened,
case·hard·en·ing,
case·hard·ens - To harden the surface or case of (iron or steel) by high-temperature shallow infusion of carbon followed by quenching.
- To make callous or insensitive.
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