/ Dictionary / Index U unthatch: Meaning and Definition of Find definitions for: un•thatch Pronunciation: (un-thach'), [key] — v.t. to remove or throw off the thatch from: to unthatch a roof. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unthankful unthink Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language