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   case-harden

   /ˈkeɪsˌhɑːdn/

   verb

   • 1. harden the surface of (a material): "the blades are case-hardened with reinforced backing plates"
   • ▪ give a hard surface to (iron or steel) by carburizing it: "the grade of steel was unsuitable for the type of heat treatment used to case-harden the gears"
   • ▪ make (someone) callous or tough: "years of surgical experience did not case-harden him to suffering"

   Scrabble Points: 16

   • C

     3

   • A

     1

   • S

     1

   • E

     1

   • -

   • H

     4

   • A

     1

   • R

     1

   • D

     2

   • E

     1

   • N

     1

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