THRUM

thrum: In Isaiah 38:12 the Revised Version (British and American) reads "He will cut me off from the loom," margin "thrum." "Thrum" is a technical term of weavers, denoting the threads of the warp hanging down in a loom, suiting dallah, "that which hangs down" (Song of Solomon 7:5, "hair"). A misinterpretation of "hanging down" is responsible for the King James' "pining sickness."

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.