tr.v. stunned, stun·ning, stuns
1. To daze or render senseless, as by a blow or loud noise.
2. To stupefy, as with the emotional impact of an experience; astound.
A blow or shock that stupefies.
[Middle English stonen, Old French estoner, from Vulgar Latin *extonāre : Latin ex-, ex- + Latin tonāre, to thunder; see (s)tenə- 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.