thor·ough·fare (thûrō-fâr′, thûrə-, thŭr-)
1. A main road or public highway.
a. A place of passage from one location to another.
b. Right to such passage.
3. A heavily traveled passage, such as a waterway, strait, or channel.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.