Shem (or Sem) was the first of the sons of Noah in the Bible. He is mentioned in Genesis 5:32, 6:10; 7:13; 9:18,23,26-27; 10; 11:10; also in 1 Chronicles[?] 1:4. The Messiah is descended from Shem in an unbroken line. The Jews derive their origin from Shem and are sometimes referred to as Semitic. However, a more recent theory states that the name may be derived from Sumer or the Sumerians.
... against the lower rim of the groove. While the axis is slipping around inside the groove, the friction between the axis and the groove rims will accelerate or brak ...