What is the meaning of face-harden?

verb

  • Harden steel by adding carbon. .
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). face-harden. Retrieved September 21, 2026, from http://smartdefine.org/face-harden/definitions/1274305
ChicagoWordNet. 2010. "face-harden" http://smartdefine.org/face-harden/definitions/1274305 (accessed September 21, 2026).
HarvardWordNet 2010, face-harden, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/face-harden/definitions/1274305>.
MLAWordNet. "face-harden" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/face-harden/definitions/1274305>