/ Dictionary / Index T tooth and nail: Meaning and Definition of Find definitions for: tooth' and nail' Pronunciation: [key] with all one's resources or energy; fiercely: We fought tooth and nail but lost. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. toothache tree tooth ax Related Content Daily Word Quiz: bibliophile Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language