source
‘a support or base’
Lexical development traced from the Tamil root:
E. sours, surs, sourse < O.F. sourse ‘a rising, beginning, fountainhead of a river or stream’ < sourdre ‘to rise, spring up’ < Lat. surgere ‘to rise, arise, get up, mount up, ascend; attack’ < sub ‘up from below’ < (s)up- + regere ‘to keep straight, guide’ < so < upo < Tamil uppu