/ Dictionary / Index E epenthesize: Meaning and Definition of Find definitions for: ep•en•the•size Pronunciation: (u-pen'thu-sīz"), [key] — -sized, -siz•ing. to insert as an epenthetic sound. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. epenthesis epergne Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language