The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix II
Semitic Roots
ENTRY:
ywm.
DEFINITION:
Common Semitic noun *yawm-, day. 1.Yom Kippur, from Hebrew yôm, day. 2. Enuma Elish (the name of the Babylonian creation epic), from Akkadian enma elî, when on high (first words of the epic), from enma, when, from ina, in, on + ma, adverbial accusative of mu, day (elî, on high; see cly).