Definitions for "Deplete"
To reduce by destroying or consuming the vital powers of; to exhaust, as a country of its strength or resources, a treasury of money, etc.
To exhaust a supply. An oil and gas reservoir is depleted when most or all recoverable hydrocarbons have been produced.
use up (resources or materials); "this car consumes a lot of gas"; "We exhausted our savings"; "They run through 20 bottles of wine a week"
To empty or unload, as the vessels of human system, by bloodletting or by medicine.
Keywords:  decrease
to decrease or use up.
Keywords:  something, return, reduce, amount
to reduce the amount of something ..... return