During research for a novel some years, I came across a reference to the Assassins, a secretive Islamic sect, whose name was derived from 'hashashin', or 'smokers of hashish'. I thought that other words we use during an everyday conversation might have just as exciting origins. This proved to be the case when I looked up the origin of the words Thug and Vandal.While on the subject of the unruly, disorderly and violent, I also checked the etymology...