... English Dictionary, then the concepts of 'primordial', 'primeval', 'primal', 'fundamental', 'elementary', &apos ;of first principle', come to ... Why do west->east flowing water- courses fertilise their banks? • Why are the banks of east->-west flowing rivers so barren? • Why are the banks of south->north flowing watercourses ... to the Oxford English Dictionary, 'ur' denotes 'primitive', 'original', 'earliest', giving such examples as 'ur-Shakespeare' or 'ur-origin'....