| 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: | swep- |
| DEFINITION: | To sleep. 1. Suffixed form *swep-os-. sopor; soporific, from Latin sopor, a deep sleep. 2. Suffixed form *swep-no-. somni-, somnolent; insomnia, from Latin somnus, sleep. 3. Suffixed zero-grade form *sup-no-. hypno-, hypnosis, hypnotic, from Greek hupnos, sleep. (Pokorny 1. s ep- 1048.) |
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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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