oil-hardened steel oil-harden • oil-hardening · · · Info · Definitions · Characters · · oil-hardened steel · · Text Common · · Latin · · Scripts 18 · · Length 4 · · Syllables Definitions · · · (noun) steel that is quenched in oil. Synonyms: oil-hardened steel. · · Noun Definition 1 Characters · · space U+0020 - hyphen-minus U+002D a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074