deplete
Concise Oxford English Dictionary © 2008 Oxford University Press:
deplete /dɪˈpliːt/
▶verb reduce the number or quantity of: fish stocks are severely depleted.
– derivatives
depleter noun,
depletion noun.
depleter noun,
depletion noun.
– origin C19 (earlier (C17) as depletion): from L. deplet-, deplere ‘empty out’, from de- (expressing reversal) + plere ‘fill’.
'deplete' also found in these Oxford entries:

