deplete

de|plete /dɪpl'iːt/ (depletes depleting depleted)
[VERB] V n
To deplete a stock or amount of something means to reduce it. (FORMAL)
...substances that deplete the ozone layer...
● depleted [ADJ]
...Robert E. Lee's worn and depleted army.
● depletion [N-UNCOUNT] usu with supp
...the depletion of underground water supplies.