1. Having no bottom.
2. Too deep to be measured: a bottomless glacial lake.
3. Difficult or impossible to understand; unfathomable: one of the bottomless mysteries of life.
4. Having no limitations or bounds; limitless: a bottomless supply of money.
a. Nude, especially unclothed below the waist: bottomless dancers.
b. Featuring such dancers as entertainment: bottomless bars.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.