war·horse also war-horse (wôrhôrs′)
1. A horse used in combat; a charger.
2. Informal A person who has been through many battles, struggles, or difficult experiences.
3. Informal A musical or dramatic work that has been performed so often that it has become widely familiar.
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.