/ Dictionary / Index S strengthless: Meaning and Definition of Find definitions for: strength•less Pronunciation: (strengkth'lis, strength'-, strenth'-), [key] — adj. lacking strength. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. strengthen strenuous 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