1. Loyal and resolute: a stalwart ally; stalwart support.
2. Strong and imposing: a stalwart oak tree.
One who steadfastly supports an organization or cause: party stalwarts.
[Middle English, alteration of stalworth, from Old English stǣlwierthe, serviceable, probably alteration of *statholwierthe, steadfast : stathol, foundation; see STADDLE + weorth, valuable; see wer-2 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.