From Longman Business Dictionary
depletede·plete /dɪˈpliːt/ verb [transitiveT] to greatly reduce the amount of something, using up nearly all of itDrastic measures will need to be taken if fish stocks in Europe’s seas are not to be disastrously depleted.
—depleted adjectiveadj [only before a noun]Measures to build up the depleted foreign exchange reserves were supported by the International Monetary Fund.