/ Dictionary / Index W water-harden: Meaning and Definition of Find definitions for: wa•ter-hard•en Pronunciation: (wô'tur-här"dn, wot'ur-), [key] — v.t. Metall. to quench (steel) in water. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. water hammer water hawthorn Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language