1. Not subject to suffering, pain, or harm.
2. Unfeeling; impassive.
[Middle English, from Old French, from Late Latin impassibilis : in-, not; see IN-1 + passibilis, passible; see PASSIBLE.]
im·pas′si·bili·ty, im·passi·ble·ness n.
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.