/ Dictionary / Index I insufferable: Meaning and Definition of Find definitions for: in•suf•fer•a•ble Pronunciation: (in-suf'ur-u-bul), [key] — adj. not to be endured; intolerable; unbearable: their insufferable insolence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: insufferable (Thesaurus) insubstantial insufficiency 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