depletable

de·plete  (d-plt)

tr.v. de·plet·ed, de·plet·ing, de·pletes

To decrease the fullness of; use up or empty out.

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[Latin dplre, dplt-, to empty : d-, de- + plre, to fill; see pel-¹ in Indo-European roots.]

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de·pleta·ble adj.

Synonyms: deplete, drain, exhaust, impoverish, enervate
These verbs all mean to weaken severely by removing something essential. Deplete refers to using up gradually and only hints at harmful consequences: The campers' food supply was quickly depleted.
Drain suggests gradual drawing off and harm: War often drains a nation's economy.
Exhaust stresses reduction to a point of uselessness: "The resources of civilization are not yet exhausted" William Ewart Gladstone.
Impoverish refers to severe reduction of resources or essential qualities: "His death has eclipsed the gaiety of nations, and impoverished the public stock of harmless pleasure" Samuel Johnson.
Enervate refers to weakening or destruction of vitality or strength: Idleness enervates the will to succeed.

Thesaurus

Adj.

1.

depletable - capable of being depleted exhaustible - capable of being used up