The chief river of the United States, rising in the lake region of northern Minnesota and flowing about 3,700 km (2,300 mi) generally southward to enter the Gulf of Mexico through a huge delta in southeast Louisiana. La Salle claimed the entire region for France after he descended to the river's mouth in 1682.
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.