1. Lacking kindness, pity, or compassion; cruel or indifferent: inhuman treatment of the prisoners.
2. Not suited for human needs: "The monks sat ... in inhuman quiet" (Maura O'Halloran).
3. Not of ordinary human nature, form, or character: "The woman ... lets out a squeal, a strange pig-squeal, completely inhuman" (Ashley Warlick).
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. 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.