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swel·ter (swĕltər)
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v. swel·tered, swel·ter·ing, swel·ters
v.intr.
To suffer from oppressive heat.
v.tr.
Archaic To exude (venom, for example).
n.
A condition of oppressive heat.
[Middle English swelteren, frequentative of swelten, to faint from heat, from Old English sweltan, to perish.]
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:

    Indo-European Roots

    Semitic Roots

    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.

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