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Of obscure origin.
The sense agrees with that of Old High German loscên (:—Old Teutonic *lut-skæ̂- Latin root *lut-: see loiter v.), which would correspond to an Old English loscian.
From: A Commentary or Exposition Upon All the Books of the New Testament
By John Trapp, 1656
A Commentary or Exposition upon the Revelation of St. Iohn the Divine
Chapter 2. P. 974