Try Our Apps
The Word of the Year is...
See more synonyms on Thesaurus.com
verb (used with object)
to make the outside surface of (an alloy having an iron base) hard by carburizing and heat treatment, leaving the interior tough and ductile.
in spirit so as to render insensible or insensitive to external impressions or influences; make callous.
Based on the Random House Dictionary, © Random House, Inc. 2016.
Cite This Source
Examples from the Web for
Many woods, however, check severely in air-drying or
in the air.
Seasoning of Wood
Joseph B. Wagner
British Dictionary definitions for
) 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
to harden the spirit or disposition of; make callous:
experience had case-hardened the judge
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Discover our greatest slideshows
8 Offbeat Literary Genres to Get...
Decode the pieces of our favorite...
Know These 9 Commonly Confused...
Uncover the mysteries of the marks...
Browse more topics on our blog
What Is the Difference Between Discreet and Discrete?
Learn the correct uses of these two commonly confused homophones.
What Character Was Removed from the Alphabet?
What mistaken pronunciation gave this character its name?
This small mark has two primary uses: to signify possession or omitted letters.
How Do I Get a Word into the Dictionary?
People invent new words all the time, but which ones actually make it?
Word of the Day
Difficulty index for
Few English speakers likely know this word
Word Value for
Words With Friends
Nearby words for case-harden
case the joint
Piece of cake?