/ Dictionary / Index E effortful: Meaning and Definition of Find definitions for: ef•fort•ful Pronunciation: (ef'urt-ful), [key] — adj. marked by effort or exertion; labored. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: effortful (Thesaurus) effort effortless Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language