| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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Appendix I
Indo-European Roots |
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| ENTRY: | yes- |
| DEFINITION: | To boil, foam, bubble. 1. yeast, from Old English gist, yeast, from Germanic *jest-. 2. kieselguhr, from Old High German jësan, to ferment, and jerian, to cause to ferment, from Germanic *jes-. 3. eczema, zeolite, from Greek zeein, zein, to boil. (Pokorny  es- 506.) |
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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