/ Dictionary / Index F face-harden: Meaning and Definition of Find definitions for: face-hard•en Pronunciation: (fās'här"dn), [key] — v.t. to harden the surface of (metal), as by chilling or casehardening. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: face-harden (Thesaurus) face gear faceless Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language