/ Dictionary / Index I insep.: Meaning and Definition of Find definitions for: insep. Pronunciation: [key] inseparable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. insentient inseparable Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language