Pronunciation: ' k ā s- ˌ här-d ə n
Function: transitive verb
Date: 1677
1 : to harden (a ferrous alloy) so that the surface layer is harder than the interior
2 : to make callous or insensible
– case-hard · ened adjective
Pronunciation: ' k ā s- ˌ här-d ə n
Function: transitive verb
Date: 1677
1 : to harden (a ferrous alloy) so that the surface layer is harder than the interior
2 : to make callous or insensible
– case-hard · ened adjective
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012