/ Dictionary / Index S strengthen: Meaning and Definition of Find definitions for: strength•en Pronunciation: (strengk'thun, streng'-, stren'-), [key] — v.t. to make stronger; give strength to. to change (a speech sound) to an articulation requiring more effort, as from fricative to stop or nongeminate to geminate. —v.i. to gain strength; grow stronger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: strengthen (Thesaurus) strength strengthless Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language