Yom Kip·pur (yôm′ kĭpər, yōm′, yŏm′, yôm′ kē-pr)
A holy day observed on the tenth day of Tishri and marked by fasting and prayer for the atonement of sins. Also called Day of Atonement.
[Hebrew yôm kippûr : yôm, day; see ywm in the Appendix of Semitic roots + kippûr, atonement (from kippēr, to cover, atone; see kpr1 in the Appendix of Semitic roots).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.