/ Dictionary / Index R roughen: Meaning and Definition of Find definitions for: rough•en Pronunciation: (ruf'un), [key] — v.t., v.i. to make or become rough or rougher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: roughen (Thesaurus) rough-dry rough endoplasmic reticulum Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language