1. A dull sound, as that of a heavy object striking a solid surface.
2. A blow or fall causing such a sound.
intr.v. thud·ded, thud·ding, thuds
To make a heavy, dull sound.
[Perhaps from Middle English thudden, to strike with a weapon, from Old English thyddan, of imitative origin.]
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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.