Nearby Words

case-harden

[keys-hahr-dn]

case·hard·en

[keys-hahr-dn]
verb (used with object)
1.
Metallurgy. to make the outside surface of (an alloy having an iron base) hard by carburizing and heat treatment, leaving the interior tough and ductile.
2.
to harden in spirit so as to render insensible or insensitive to external impressions or influences; make callous.

Origin:
1670–80; case2 + harden
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Case-harden is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
case-harden
 
vb
1.  metallurgy to form a hard surface layer of high carbon content on (a steel component) by heating in a carburizing environment with subsequent quenching or heat treatment
2.  to harden the spirit or disposition of; make callous: experience had case-hardened the judge

Collins English Dictionary - Complete & Unabridged 10th Edition
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