al·lied (ə-līd, ălīd′)
1. Joined or united in a close relationship: allied tribes.
2. Of a similar nature; related: city planning and allied studies.
3. Allied Of or relating to the Allies: the Allied invasion of southern Italy.
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.