I think it is a great stretch for me to use the word "waste" as a derivative of the word "west".
Since a goddess was used to denote the sunrise Ishtar, perhaps a goddess was also used to denote the sunset, maybe the Egyptian goddess Bast (west).
The sun rises in the Isht and sets in the Bast.
Bast was also a Goddess of the sun and later the Greeks attributed her as a Goddess of the moon.
She was also associated with much drunkenness... People would get bashed and get "wasted"... (west) waste lol
Photograph of an alabaster cosmetic jar topped with a lioness, representing Bast, an Eighteenth Dynasty burial artifact from the tomb of Tutankhamun (c. 1323 BC—Cairo Museum)
Images of Bastet were often created from alabaster. The goddess was sometimes depicted holding a ceremonial sistrum in one hand and an aegis in the other
(A sistrum is a musical instrument of the percussion family, chiefly associated with ancient Egypt and Iraq.)
I have a tendency to see things where they are not and associate things that are likely to have no real connection.
Herodotus also relates that of the many solemn festivals held in Egypt, the most important and most popular one was that celebrated in Bubastis in honor of the goddess. Each year on the day of her festival, the town was said to have attracted some 700,000 visitors, both men and women (but not children), who arrived in numerous crowded ships. The women engaged in music, song, and dance on their way to the place. Great sacrifices were made and prodigious amounts of wine were drunk—more than was the case throughout the year. This accords well with Egyptian sources which prescribe that lioness goddesses are to be appeased with the "feasts of drunkenness".
Sounds like a waste or bash to me ...