/ Dictionary / Index B bottomless pit: Meaning and Definition of Find definitions for: bot'tomless pit' Pronunciation: [key] hell (def. 1). something that drains all one's energy or resources. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bottomless bottom line Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language