单词	case-hardens
释义	case-harden verb case-hard·​en ˈkās-ˌhär-dᵊn  case-hardened; case-hardening; case-hardens transitive verb 1 : to harden (a ferrous alloy) so that the surface layer is harder than the interior 2 : to make callous or insensible case-hardened adjective Word History First Known Use 1677, in the meaning defined at sense 1 case-hardens verb present tense third-person singular of case-harden as in tempers Synonyms & Similar Words Relevance tempers rigidifies anneals gelates crystallizes calcifies gels petrifies coagulates jellies stiffens ossifies incrusts thickens gelatinizes encrusts cakes jells crystalizes clots freezes indurates calluses concretes firms (up) solidifies hardens congeals sets Antonyms & Near Antonyms softens liquefies melts dissolves fuses liquifies deliquesces smelts thaws fluxes unfreezes See More
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